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Ameyaw EK, Woytowich D, Gbagbo FY, Amoah PA. Assessing geographical variation in ovulatory cycle knowledge among women of reproductive age in Sierra Leone: Analysis of the 2019 Demographic and Health Survey. PLoS One 2024; 19:e0300239. [PMID: 38625990 PMCID: PMC11020968 DOI: 10.1371/journal.pone.0300239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 02/23/2024] [Indexed: 04/18/2024] Open
Abstract
BACKGROUND Sierra Leone has poor indicators of reproductive health and a high prevalence of unintended pregnancies. To date, no study has explored determinants of ovulatory cycle knowledge in Sierra Leone. We investigated geographic region to determine where the needs for improved ovulatory cycle knowledge are greatest in Sierra Leone. METHODS This is a cross-sectional study of women of reproductive age (n = 15,574) based on the 2019 Sierra Leone Demographic and Health Survey. Geographic region and sociodemographic covariates were included in a multivariate logistic regression model predicting the odds that participants possessed accurate knowledge of when in the ovulatory cycle pregnancy initiation is most likely. RESULTS In Sierra Leone, 39.8% (CI = 37.4-40.9) of 15-49-year-old women had accurate knowledge of the ovulatory cycle. Women in the Northern and Southern regions possessed the highest prevalence of correct knowledge (46.7%, CI = 43.1-50.3 and 45.1%, CI = 41.9-48.2, respectively). Women from the Northwestern (AOR = 0.29, CI = 0.22-0.38), Eastern (AOR = 0.55, CI = 0.41-0.72), and Western regions (AOR = 0.63, CI = 0.50-0.80) had significantly lower odds of accurate ovulatory cycle knowledge compared to others. Women aged 15-19, those with a primary school education, and participants with a parity of none all had the lowest odds of correct ovulatory cycle knowledge as well. CONCLUSION Less than four in ten women in Sierra Leone had accurate knowledge of when in the ovulatory cycle pregnancy is most likely to occur. This suggests that family planning outreach programs should include education on the ovulatory cycle and the importance of understanding the implications of its timing. This can reduce the risk of unintended pregnancies throughout Sierra Leone, and can have an especially positive impact in the Northwestern, Eastern, and Western regions, where ovulatory cycle knowledge was significantly lower.
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Affiliation(s)
- Edward Kwabena Ameyaw
- Institute of Policy Studies and School of Graduate Studies, Lingnan University, Tuen Mun, Hong Kong
| | - Daniel Woytowich
- California State University Los Angeles, Los Angeles, California, United States of America
| | | | - Padmore Adusei Amoah
- Institute of Policy Studies and School of Graduate Studies, Lingnan University, Tuen Mun, Hong Kong
- Department of Psychology, School of Graduate Studies, Institute of Policy Studies, Lingnan University, Tuen Mun, Hong Kong SAR
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Li RHW, Lo SST, Gemzell-Danielsson K, Fong CHY, Ho PC, Ng EHY. Oral emergency contraception with levonorgestrel plus piroxicam: a randomised double-blind placebo-controlled trial. Lancet 2023; 402:851-858. [PMID: 37597523 DOI: 10.1016/s0140-6736(23)01240-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 05/22/2023] [Accepted: 06/13/2023] [Indexed: 08/21/2023]
Abstract
BACKGROUND Levonorgestrel, a standard drug for emergency contraception (EC), is not effective if administered post-ovulation. A cyclo-oxygenase inhibitor could contribute synergistic effects. We investigated whether a single 40 mg oral dose of piroxicam as co-treatment with levonorgestrel improved emergency contraceptive efficacy. METHODS This was a randomised double-blind placebo-controlled trial carried out in a major community sexual and reproductive health service in Hong Kong. Women who required levonorgestrel EC within 72 h of unprotected sexual intercourse were recruited and block-randomised in a 1:1 ratio to receive a single supervised dose of levonorgestrel 1·5 mg plus either piroxicam 40 mg or placebo orally. Group assignment was concealed in opaque envelopes and masked to the women, clinicians, and investigators. At follow-up 1-2 weeks after the next expected period, the pregnancy status was noted by history or pregnancy test. The primary efficacy outcome was the proportion of pregnancies prevented out of those expected based on an established model. All women randomised to receive the study drug and who completed the follow-up were analysed. The trial was registered with ClinicalTrials.gov, NCT03614494. FINDINGS 860 women (430 in each group) were recruited between Aug 20, 2018, and Aug 30, 2022. One (0·2%) of 418 efficacy-eligible women in the piroxicam group were pregnant, compared with seven (1·7%) of 418 in the placebo group (odds ratio 0·20 [95% CI 0·02-0·91]; p=0·036). Levonorgestrel plus piroxicam prevented 94·7% of expected pregnancies compared with 63·4% for levonorgestrel plus placebo. We noted no significant difference between the two groups in the proportion of women with advancement or delay of their next period, or in the adverse event profile. INTERPRETATION Oral piroxicam 40 mg co-administered with levonorgestrel improved efficacy of EC in our study. Piroxicam co-administration could be considered clinically where levonorgestrel EC is the option of choice. FUNDING None.
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Affiliation(s)
- Raymond Hang Wun Li
- Department of Obstetrics and Gynaecology, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China; The Family Planning Association of Hong Kong, Hong Kong Special Administrative Region, China.
| | - Sue Seen Tsing Lo
- Department of Obstetrics and Gynaecology, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China; The Family Planning Association of Hong Kong, Hong Kong Special Administrative Region, China
| | - Kristina Gemzell-Danielsson
- Department of Obstetrics and Gynaecology, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China; Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden
| | - Carol Ho Yi Fong
- Department of Medicine, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Pak Chung Ho
- Department of Obstetrics and Gynaecology, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China; The Family Planning Association of Hong Kong, Hong Kong Special Administrative Region, China
| | - Ernest Hung Yu Ng
- Department of Obstetrics and Gynaecology, School of Clinical Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China; The Family Planning Association of Hong Kong, Hong Kong Special Administrative Region, China
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Sapapsap B, Leelakanok N, Boonpattharatthiti K, Siritientong T, Methaneethorn J. A systematic review and meta-analysis of the prevalence and association between levonorgestrel and ectopic pregnancy. Expert Opin Drug Saf 2023; 22:929-941. [PMID: 37577925 DOI: 10.1080/14740338.2023.2247965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 07/12/2023] [Accepted: 08/09/2023] [Indexed: 08/15/2023]
Abstract
BACKGROUND The use of levonorgestrel emergency oral contraceptives (EOCs) is one of the factors that may be associated with ectopic pregnancy. We aimed to investigate the incidence of ectopic pregnancy in EOC users and the association between EOCs and ectopic pregnancy. RESEARCH DESIGN AND METHODS We searched for articles that provided the incidence of and the association between levonorgestrel EOCs and ectopic pregnancy in women of reproductive ages in CINAHL Complete, Medline, OpenDissertations, Scopus, Science Direct, and Thai Journal Online. The risk of bias was assessed by Risk Of Bias In Non-randomized Studies or Risk of Bias 2. A meta-analysis was conducted using the random-effects model. RESULTS We retrieved 1839 nonredundant articles from the systematic search. The meta-analysis showed that the prevalence of ectopic pregnancy was not statistically different from zero (pooled prevalence estimate = 0.029%; 95%CI: -0.006, 0.065; N = 9; I2 = 0) and rare. In addition, levonorgestrel EOCs increased the risk of ectopic pregnancy (OR = 6.17; 95%CI: 3.78, 10.08; N = 5; I2 = 43%). CONCLUSIONS Women with extrauterine or ectopic pregnancy had higher odds of using levonorgestrel emergency oral contraceptives than those with intrauterine pregnancy. However, the prevalence of ectopic pregnancy is rare.
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Affiliation(s)
- Bannawich Sapapsap
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Burapha University, Chonburi, Thailand
| | - Nattawut Leelakanok
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Burapha University, Chonburi, Thailand
| | - Kansak Boonpattharatthiti
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Burapha University, Chonburi, Thailand
| | - Tippawan Siritientong
- Department of Food and Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Janthima Methaneethorn
- Department of Pharmacy Practice, Faculty of Pharmaceutical Sciences, Naresuan University, Phitsanulok, Thailand
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Brummett A, Mason-Maready M, Whiting V. Catholic Hospitals Should Permit Physicians to Provide Emergency Contraception to Rape Victims as an Act of Conscientious Provision. LINACRE QUARTERLY 2023; 90:24-34. [PMID: 36923677 PMCID: PMC10009144 DOI: 10.1177/00243639221098227] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
While many Catholic hospitals permit the prescription of the emergency contraception drug levonorgestrel for rape victims, some continue to prohibit this practice as a matter of institutional conscience. While the standard approach to this issue has been to offer an argument that levonorgestrel either is or is not morally permissible, we have taken a different tack. We begin by briefly describing and acknowledging that reasonable disagreement exists on this question (part one), and then arguing that the reasonable disagreement itself can serve as a compelling basis for Catholic leadership at hospitals that prohibit emergency contraception for rape victims to accommodate physicians who wish to provide levonorgestrel as a matter of conscience (part two). We end by anticipating and responding to some objections.
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Affiliation(s)
- Abram Brummett
- Oakland University William Beaumont School of Medicine, Rochester, MI, USA
- Royal Oak Beaumont Hospital, Royal Oak, MI, USA
| | | | - Victoria Whiting
- Oakland University William Beaumont School of Medicine, Rochester, MI, USA
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5
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Salcedo J, Cleland K, Bartz D, Thompson I. Society of Family Planning Clinical Recommendation: Emergency contraception. Contraception 2023; 121:109958. [PMID: 36693445 DOI: 10.1016/j.contraception.2023.109958] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 12/30/2022] [Accepted: 01/10/2023] [Indexed: 01/22/2023]
Abstract
Emergency contraception (EC) refers to several contraceptive options that can be used within a few days after unprotected or under protected intercourse or sexual assault to reduce the risk of pregnancy. Current EC options available in the United States include the copper intrauterine device (IUD), levonorgestrel (LNG) 52 mg IUD, oral LNG (such as Plan B One-Step, My Way, Take Action), and oral ulipristal acetate (UPA) (ella). These clinical recommendations review the indications, effectiveness, safety, and side effects of emergency contraceptive methods; considerations for the use of EC by specific patient populations and in specific clinical circumstances and current barriers to emergency contraceptive access. Further research is needed to evaluate the effectiveness of LNG IUDs for emergency contraceptive use; address the effects of repeated use of UPA at different times in the same menstrual cycle; assess the impact on ovulation of initiating or reinitiating different regimens of regular hormonal contraception following UPA use; and elucidate effective emergency contraceptive pill options by body mass indices or weight.
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Affiliation(s)
- Jennifer Salcedo
- Department of Obstetrics and Gynecology, New York Medical College, Valhalla, NY, United States.
| | - Kelly Cleland
- American Society for Emergency Contraception, Lawrenceville, NJ, United States
| | - Deborah Bartz
- Department of Obstetrics and Gynecology, Harvard Medical School, Brigham and Women's Hospital, Boston, MA, United States
| | - Ivana Thompson
- Department of Obstetrics and Gynecology, University of Washington, Seattle, WA, United States
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Emergency Contraception: Access and Challenges at Times of Uncertainty. Am J Ther 2022; 29:e553-e567. [PMID: 35998109 DOI: 10.1097/mjt.0000000000001560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND The UN Commission on Life-Saving Commodities for Women's and Children's Health identified emergency contraceptive pills as 1 of the 13 essential underused, low-cost, and high-impact commodities that could save the lives of millions of women and children worldwide. In the US, 2 emergency contraceptive regimens are currently approved, and their most plausible mechanism of action involves delaying and/or inhibiting ovulation. AREAS OF UNCERTAINTY Abortion and contraception are recognized as essential components of reproductive health care. In the US, in the wake of the Dobbs v. Jackson Women's Health Organization Supreme Court decision on June 24, 2022, 26 states began to or are expected to severely restrict abortion. It is anticipated that these restrictions will increase the demand for emergency contraception (EC). Several obstacles to EC access have been described, and these include cost, hurdles to over-the-counter purchase, low awareness, myths about their mechanisms of action, widespread misinformation, and barriers that special populations face in accessing them. The politicization of EC is a major factor limiting access. Improving sex education and health literacy, along with eHealth literacy, are important initiatives to improve EC uptake and access. DATA SOURCES PubMed, The Guttmacher Institute, Society of Family Planning, American College of Obstetrician and Gynecologists, the World Health Organization, The United Nations. THERAPEUTIC ADVANCES A randomized noninferiority trial showed that the 52 mg levonorgestrel intrauterine device was noninferior to the copper intrauterine device when used as an EC method in the first 5 days after unprotected intercourse. This is a promising and highly effective emergency contraceptive option, particularly for overweight and obese patients, and a contraceptive option with a different bleeding profile than the copper intrauterine device. CONCLUSIONS EC represents an important facet of medicine and public health. The 2 medical regimens currently approved in the US are very effective, have virtually no medical contraindications, and novel formulations are actively being investigated to make them more convenient and effective for all patient populations. Barriers to accessing EC, including the widespread presence of contraception deserts, threaten to broaden and accentuate the already existing inequities and disparities in society, at a time when they have reached the dimensions of a public health crisis.
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Kang Y, Tan Y, Wang C, Yao B, An K, Liu M, Su J. Antifertility effects of levonorgestrel, quinestrol and their mixture (EP-1) on plateau zokor in the Qinghai-Tibetan Plateau. Integr Zool 2022; 17:1002-1016. [PMID: 35271766 DOI: 10.1111/1749-4877.12642] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The plateau zokor (Eospalax baileyi Thomas, 1911) is a key species in the Qinghai-Tibetan Plateau ecosystem, and fertility control could be an ideal approach to manage populations of this subterranean species. In this laboratory study, we explored the effects of the mixture of levonorgestrel and quinestrol (EP-1, 1:2), quinestrol (E), and levonorgestrel (P) on the reproductive status of plateau zokors. Groups of five animals of each sex were treated with different concentrations of EP-1 (1, 5, and 10 mg/kg), E (0.33, 3.3, and 6.6 mg/kg), and P (0.67, 3.35, and 6.7 mg/kg) by oral gavage over 7 successive days and killed on day 15. Body mass reduction was observed in the EP-1 and E groups. EP-1 and E significantly reduced the weight of testis and epididymis at 10 and 3.3 mg/kg, respectively. Sperm count and motility were significantly reduced by 5 mg/kg EP-1 and 0.33 mg/kg E. The levels of serum testosterone, estradiol, luteinizing hormone, and follicle stimulating hormone were significantly reduced by 5 mg/kg EP-1 and 3.3 mg/kg E. EP-1 and E significantly reduced the uterine and ovarian weights at 10 and 3.3 mg/kg, respectively. In the plateau zokors, treatment with P had no influence on the reproductive status. These data demonstrate that EP-1 and E have an inhibitory effect on a range of reproductive parameters in the plateau zokors. Further assessment is required to determine the effects on breeding and recruitment in enclosure or field experiments. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Yunkun Kang
- College of Grassland Science, Key Laboratory of Grassland Ecosystem (Ministry of Education), Gansu Agricultural University, Lanzhou, 730070, China.,Gansu Agricultural University-Massey University Research Centre for Grassland Biodiversity, Gansu Agricultural University, Lanzhou, 730070, China
| | - Yuchen Tan
- College of Grassland Science, Key Laboratory of Grassland Ecosystem (Ministry of Education), Gansu Agricultural University, Lanzhou, 730070, China.,Gansu Agricultural University-Massey University Research Centre for Grassland Biodiversity, Gansu Agricultural University, Lanzhou, 730070, China
| | - Chan Wang
- College of Grassland Science, Key Laboratory of Grassland Ecosystem (Ministry of Education), Gansu Agricultural University, Lanzhou, 730070, China.,Gansu Agricultural University-Massey University Research Centre for Grassland Biodiversity, Gansu Agricultural University, Lanzhou, 730070, China
| | - Baohui Yao
- College of Grassland Science, Key Laboratory of Grassland Ecosystem (Ministry of Education), Gansu Agricultural University, Lanzhou, 730070, China.,Gansu Agricultural University-Massey University Research Centre for Grassland Biodiversity, Gansu Agricultural University, Lanzhou, 730070, China
| | - Kang An
- College of Grassland Science, Key Laboratory of Grassland Ecosystem (Ministry of Education), Gansu Agricultural University, Lanzhou, 730070, China.,Gansu Agricultural University-Massey University Research Centre for Grassland Biodiversity, Gansu Agricultural University, Lanzhou, 730070, China
| | - Ming Liu
- International Society of Zoological Sciences, Beijing, 100101, China
| | - Junhu Su
- College of Grassland Science, Key Laboratory of Grassland Ecosystem (Ministry of Education), Gansu Agricultural University, Lanzhou, 730070, China.,Gansu Agricultural University-Massey University Research Centre for Grassland Biodiversity, Gansu Agricultural University, Lanzhou, 730070, China
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8
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Effect of levonorgestrel emergency contraception on implantation and fertility: a review. Contraception 2022; 109:8-18. [DOI: 10.1016/j.contraception.2022.01.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 01/09/2022] [Accepted: 01/11/2022] [Indexed: 12/30/2022]
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Cleland K, Marcantonio TL, Hunt ME, Jozkowski KN. "It prevents a fertilized egg from attaching…and causes a miscarriage of the baby": A qualitative assessment of how people understand the mechanism of action of emergency contraceptive pills. Contraception 2021; 103:408-413. [PMID: 33508253 DOI: 10.1016/j.contraception.2021.01.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 01/15/2021] [Accepted: 01/20/2021] [Indexed: 11/25/2022]
Abstract
OBJECTIVE The mechanism of action (MOA) of emergency contraceptive pills (ECPs) is frequently mischaracterized. Our objective was to identify how members of the general public understand the mechanisms of ECPs. STUDY DESIGN We recruited a convenience sample from social media for a survey about reproductive health attitudes and analyzed spontaneous descriptions of how ECPs work. We inductively coded responses to create themes and subthemes, and collapsed subthemes into three MOA categories based on previous research. RESULTS Among 1443 respondents, 533 mentioned an MOA in their description of ECPs. While nearly half of these responses (49.5%) stated that ECPs prevent pregnancy before fertilization occurs (in accordance with most biomedical ECP research), over 60% described a mechanism related to preventing implantation of a fertilized egg. Nine percent of responses described a postimplantation mechanism that would be considered abortion by mainstream medical standards. Some respondents conveyed significant confusion about the biological processes involved with pregnancy and pregnancy prevention. CONCLUSION Confusion about how ECPs work was common among our sample. The largest group of responses described a mechanism-preventing implantation of a fertilized egg-listed on the Food and Drug Administration (FDA)-approved ECP labels that does not reflect most relevant biomedical research. Mischaracterizations of ECPs' mechanisms have been used to limit access to EC. These misunderstandings were common in our sample and may reflect poor quality sex education and public information, and confusion introduced by the FDA-approved labels. Additional research should identify whether public perception of ECPs' mechanisms influences policy, health care provision, and use of ECPs.
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Affiliation(s)
- Kelly Cleland
- American Society for Emergency Contraception, Lawrenceville NJ, United States.
| | - Tiffany L Marcantonio
- Department of Health, Human Performance and Recreation, University of Arkansas, Fayetteville AR, United States
| | - Mary E Hunt
- Department of Health and Human Development, Western Washington University, Bellingham WA, United States
| | - Kristen N Jozkowski
- Department of Applied Health Science, School of Public Health, Indiana University, Bloomington IN, United States
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Newton VL, Dickson J, Hoggart L. Young women's fertility knowledge: partial knowledge and implications for contraceptive risk-taking. BMJ SEXUAL & REPRODUCTIVE HEALTH 2020; 46:147-151. [PMID: 31941769 DOI: 10.1136/bmjsrh-2019-200473] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 12/17/2019] [Accepted: 12/17/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND There is a lack of research on young women's fertility knowledge and awareness. This has implications for contraceptive risk-taking, including the use of emergency hormonal contraception (EHC). By drawing on two research studies, this article shows how greater fertility knowledge could benefit young women in terms of pregnancy prevention. METHODS We draw on two qualitative research studies ('fertility study' and 'abortion study') resulting in a composite sample of 46 interviews with women aged 16-24 years. Focused secondary analysis was undertaken looking specifically at fertility knowledge in relation to contraceptive behaviour. FINDINGS A lack of accurate knowledge about the menstrual cycle was evident in two ways. Young women drew conclusions about their invulnerability to pregnancy if previous unprotected sexual intercourse (UPSI) had not resulted in pregnancy. Additionally, although participants were aware of EHC, there was no awareness of when it might fail other than after a certain time limit. CONCLUSIONS Young women would benefit from a more nuanced understanding of fertility. Episodes of UPSI that do not result in pregnancy can encourage a belief that 'it won't happen to me', and this has implications for taking chances with contraception. Partial knowledge about the effectiveness of EHC may also lead to unintended pregnancy. Calculating the number of hours following UPSI generates overreliance on what is only one of the factors determining the effectiveness of EHC. Information regarding the link between EHC and failure rates near the day of ovulation needs to be more widely publicised.
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Affiliation(s)
- Victoria Louise Newton
- School of Health, Wellbeing and Social Care, Faculty of Wellbeing, Education and Language Studies, The Open University, Milton Keynes, UK
| | - Jane Dickson
- Sexual and Reproductive Health, Aneurin Bevan University Health Board, Newport, UK
| | - Lesley Hoggart
- School of Health, Wellbeing and Social Care, Faculty of Wellbeing, Education and Language Studies, The Open University, Milton Keynes, UK
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Cleland K, Wagner B, Smith NK, Trussell J. "My BMI is too high for Plan B." A changing population of women seeking ulipristal acetate emergency contraception online. Women Health 2020; 60:241-248. [PMID: 31284850 PMCID: PMC6946884 DOI: 10.1080/03630242.2019.1635560] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 05/31/2019] [Accepted: 06/01/2019] [Indexed: 12/30/2022]
Abstract
Emergency contraceptive (EC) pills may be less effective for women with higher body mass index (BMI), but little is known about public response to the fact that EC may lose efficacy as weight increases. In November 2013, European authorities changed the label for a levonorgestrel EC product to warn of a reduction in effectiveness for women with higher BMI, garnering significant media coverage in the United States. Ulipristal acetate (UPA) EC may be more effective than levonorgestrel for women with BMI levels designated as obese. Among 8,019 women who received UPA from the online pharmacy KwikMed from 2011 to 2015 and self-reported their height, weight and reasons for seeking UPA online, we analyzed changes in the proportion of women in different BMI categories before and after the label change. For the 25 month-period after the label change, the proportion of women in the obese category rose by 26.7 percentage points relative to the 35 months before (B = 0.2665, p < .01). Mean BMI (25.5 versus 29.4, p < .001) and average weight (148.6 pounds versus 175.5 pounds, p < .001) of users were higher after the label change. Some women appear to have acted on the information that EC efficacy may be associated with body weight.
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Affiliation(s)
| | - Brandon Wagner
- Office of Population Research, Princeton University
- Texas Tech University
| | | | - James Trussell
- Office of Population Research, Princeton University
- Dr. Trussell is now deceased
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12
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Wagner BG, Cleland K, Batur P, Wu J, Rothberg MB. Emergency contraception: Links between providers' counseling choices, prescribing behaviors, and sociopolitical context. Soc Sci Med 2019; 242:112588. [DOI: 10.1016/j.socscimed.2019.112588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 09/20/2019] [Accepted: 10/03/2019] [Indexed: 12/30/2022]
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13
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Mozzanega B, Nardelli GB. UPA and LNG in emergency contraception: the information by EMA and the scientific evidences indicate a prevalent anti-implantation effect. EUR J CONTRACEP REPR 2019; 24:4-10. [DOI: 10.1080/13625187.2018.1555662] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Bruno Mozzanega
- Department SDB Woman’s and Child’s Health, University of Padua, Padova, Italy
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14
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Rapidly separable microneedle patch for the sustained release of a contraceptive. Nat Biomed Eng 2019; 3:220-229. [DOI: 10.1038/s41551-018-0337-4] [Citation(s) in RCA: 189] [Impact Index Per Article: 37.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 11/27/2018] [Indexed: 01/01/2023]
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Saldanha N. Use of Short Acting Reversible Contraception in Adolescents: The Pill, Patch, Ring and Emergency Contraception. Curr Probl Pediatr Adolesc Health Care 2018; 48:333-344. [PMID: 30470471 DOI: 10.1016/j.cppeds.2018.11.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Long acting reversible contraception (LARC) is the recommend form of birth control for adolescents by both the American Academy of Pediatrics and the American Congress of Obstetrics and Gynecology, but the majority of adolescents continue to use short acting reversible contraception (SARC) such as the oral contraceptive pill, vaginal ring, and transdermal patch. For this reason, it is important for medical providers to be familiar with how to prescribe and manage SARC in adolescents, paying particular attention to which patients are eligible to use them, which benefits the methods have outside of contraception, what side effects to be aware of, and special considerations for adolescents. Many adolescents will choose not to use any form of hormonal contraception-thus having a knowledge about and comfort with use of emergency contraception is of equal importance.
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Affiliation(s)
- Nadia Saldanha
- Division of Adolescent Medicine, Cohen Children's Medical Center, Northwell Health, 410 Lakeville Road, Suite 108, New Hyde Park, New York, NY 11042, United State; Donald and Barbara Zucker School of Medicine at Hofstra/Northwell Hempstead, New York, United State.
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Haeger KO, Lamme J, Cleland K. State of emergency contraception in the U.S., 2018. Contracept Reprod Med 2018; 3:20. [PMID: 30202545 PMCID: PMC6123910 DOI: 10.1186/s40834-018-0067-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Accepted: 06/20/2018] [Indexed: 12/30/2022] Open
Abstract
Emergency contraception is indicated in instances of unprotected sexual intercourse, including reproductive coercion, sexual assault, and contraceptive failure. It plays a role in averting unintended pregnancies due to inconsistent use or non-use of contraception. Options for emergency contraception vary by efficacy as well as accessibility within the U.S. This paper provides an overview of levonorgestrel (Plan B One-Step and generic counterparts), ulipristal acetate (sold as ella), and the copper intrauterine device (IUD, sold as ParaGard), including the mechanisms of action, administration, efficacy, drug interactions, safety, side effects, advantages, and drawbacks. It will also review current misconceptions about emergency contraception and access for subpopulations, including adolescents, immigrants, survivors of sexual assault, rural populations, and military/veteran women. This paper will address barriers such as gaps in knowledge, and financial, health systems, and practice barriers. Continuing areas of research, including the impact of body weight on the efficacy of emergency contraceptive pills and potential interactions between ulipristal acetate and ongoing hormonal contraceptives, are also addressed.
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Affiliation(s)
- Kristin O. Haeger
- Department of Veterans Affairs, Veterans Health Administration, Office of Patient Care Services, Women’s Health Services, 810 Vermont Ave., NW, Washington, DC, 20420 USA
| | - Jacqueline Lamme
- Department of Obstetrics & Gynecology, U.S. Naval Hospital Okinawa, Okinawa, Japan
| | - Kelly Cleland
- Office of Population Research, Princeton University, 218 Wallace Hall, Princeton, NJ 08544 USA
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Cleland K, Wagner B, Batur P, McNamara M, Wu J, Rothberg MB. The politics of place: Presidential voting patterns and providers' prescription of emergency contraception. Contraception 2018; 98:237-242. [PMID: 29778587 DOI: 10.1016/j.contraception.2018.05.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 03/07/2018] [Accepted: 05/13/2018] [Indexed: 11/25/2022]
Abstract
OBJECTIVE The most effective forms of emergency contraception (EC) require a prescription or a medical procedure; therefore, provider willingness to offer EC remains critical to patient access. This study seeks to assess whether political alignment of a provider's county is associated with provider attitudes and behaviors regarding EC. STUDY DESIGN We analyzed survey data collected from 1313 healthcare providers from February 2013 to April 2014 at 14 academic medical centers in the United States. Using logistic regression, we estimated associations between the county political alignment of a provider's practice and his or her EC-related beliefs and practices: 1) if the provider is aware of the most effective EC methods; 2) if knowing that a hypothetical EC method prevented implantation would make a provider less likely to prescribe that method because of personal ethical or religious reasons; and 3) if the provider prescribes any form of EC in his or her practice. RESULTS In multivariate models, a one percentage-point increase in county Republican vote share was associated with a 2.9% decrease in the odds of a provider prescribing EC, after accounting for provider knowledge and attitudes about EC. CONCLUSIONS EC provides a critical last chance to prevent pregnancy after unprotected sex, yet women living in Republican-leaning counties may face difficulty obtaining EC from healthcare providers. Programs seeking to improve access to EC should focus on areas likely to have fewer providers willing to prescribe EC, which may be those that are more Republican-leaning. IMPLICATIONS The most effective forms of emergency contraception require a prescription or a medical procedure; therefore, provider willingness to offer EC remains critical to patient access. Women living in Republican-leaning counties may face difficulty obtaining emergency contraception from healthcare providers.
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Affiliation(s)
- Kelly Cleland
- Office of Population Research, Princeton University, 218 Wallace Hall, Princeton, NJ 08544.
| | - Brandon Wagner
- Department of Sociology, Anthropology, and Social Work, Texas Tech University
| | - Pelin Batur
- Cleveland Clinic, Cleveland Clinic Lerner College of Medicine
| | - Megan McNamara
- Louis Stokes Department of Veterans Affairs Medical Center, Case Western Reserve University
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Massawe AW, Makundi RH, Zhang Z, Mhamphi G, Liu M, Li HJ, Belmain SR. Effect of synthetic hormones on reproduction in Mastomys natalensis. JOURNAL OF PEST SCIENCE 2018; 91:157-168. [PMID: 29367841 PMCID: PMC5750330 DOI: 10.1007/s10340-017-0894-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 05/31/2017] [Accepted: 06/03/2017] [Indexed: 05/06/2023]
Abstract
Rodent pest management traditionally relies on some form of lethal control. Developing effective fertility control for pest rodent species could be a major breakthrough particularly in the context of managing rodent population outbreaks. This laboratory-based study is the first to report on the effects of using fertility compounds on an outbreaking rodent pest species found throughout sub-Saharan Africa. Mastomys natalensis were fed bait containing the synthetic steroid hormones quinestrol and levonorgestrel, both singly and in combination, at three concentrations (10, 50, 100 ppm) for 7 days. Consumption of the bait and animal body mass was mostly the same between treatments when analysed by sex, day and treatment. However, a repeated measures ANOVA indicated that quinestrol and quinestrol + levonorgestrel treatments reduced consumption by up to 45%, particularly at the higher concentrations of 50 and 100 ppm. Although there was no clear concentration effect on animal body mass, quinestrol and quinestrol + levonorgestrel lowered body mass by up to 20% compared to the untreated and levonorgestrel treatments. Quinestrol and quinestrol + levonorgestrel reduced the weight of male rat testes, epididymis and seminal vesicles by 60-80%, and sperm concentration and motility were reduced by more than 95%. No weight changes were observed to uterine and ovarian tissue; however, high uterine oedema was observed among all female rats consuming treated bait at 8 and 40 days from trial start. Trials with mate pairing showed there were significant differences in the pregnancy rate with all treatments when compared to the untreated control group of rodents.
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Affiliation(s)
- Apia W. Massawe
- Pest Management Centre, Africa Centre of Excellence for Innovative Rodent Pest Management and Biosensor Technology Development, Sokoine University of Agriculture, Morogoro, Tanzania
| | - Rhodes H. Makundi
- Pest Management Centre, Africa Centre of Excellence for Innovative Rodent Pest Management and Biosensor Technology Development, Sokoine University of Agriculture, Morogoro, Tanzania
| | - Zhibin Zhang
- State Key Laboratory of Pest Management of Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101 China
| | - Ginethon Mhamphi
- Pest Management Centre, Africa Centre of Excellence for Innovative Rodent Pest Management and Biosensor Technology Development, Sokoine University of Agriculture, Morogoro, Tanzania
| | - Ming Liu
- State Key Laboratory of Reproductive and Stem Cell Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101 China
| | - Hong-Jun Li
- State Key Laboratory of Pest Management of Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101 China
| | - Steven R. Belmain
- Natural Resources Institute, University of Greenwich, Chatham Maritime, Kent, ME4 4TB UK
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19
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Effect of ulipristal acetate and mifepristone at emergency contraception dose on the embryo-endometrial attachment using an in vitro human trophoblastic spheroid and endometrial cell co-culture model. Hum Reprod 2017; 32:2414-2422. [DOI: 10.1093/humrep/dex328] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2017] [Accepted: 10/19/2017] [Indexed: 12/23/2022] Open
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Cameron ST, Li HWR, Gemzell-Danielsson K. Current controversies with oral emergency contraception. BJOG 2017; 124:1948-1956. [DOI: 10.1111/1471-0528.14773] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/29/2017] [Indexed: 12/30/2022]
Affiliation(s)
- ST Cameron
- Chalmers Sexual and Reproductive Health Centre; Edinburgh UK
| | - HWR Li
- Department of Obstetrics and Gynaecology; University of Hong Kong; Queen Mary Hospital; Hong Kong Hong Kong
- Shenzhen Key Laboratory of Fertility Regulation; Reproductive Medicine Centre; The University of Hong Kong-Shenzhen Hospital; Shenzhen China
| | - K Gemzell-Danielsson
- Shenzhen Key Laboratory of Fertility Regulation; Reproductive Medicine Centre; The University of Hong Kong-Shenzhen Hospital; Shenzhen China
- Department of Women's and Children's Health; Division of Obstetrics and Gynaecology; Karolinska Institutet; Karolinska University Hospital; Stockholm Sweden
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21
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Abstract
Unplanned or unintended pregnancy remains a significant challenge for adolescents; many teens who plan ahead but opt not to choose long-acting reversible contraceptive methods have high failure rates with condom usage, oral contraceptives, and other less long-acting methods. Emergency contraception (EC) remains a necessity for those adolescents seeking a second chance to prevent the unintended consequences of unplanned sexual activity. At present, 5 postcoital methods remain available as EC globally: intrauterine devices, ulipristal acetate, a selective progesterone modulator, mifepristone; levonorgestrel, and ethinyl estradiol plus levonorgestrel or norgestrel (rarely used now that progestin only methods are more readily available).
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Affiliation(s)
- Ellen S Rome
- Center for Adolescent Medicine, Cleveland Clinic Children's Hospital, A120, 9500 Euclid Avenue, Cleveland, OH 44195, USA; Cleveland Clinic Lerner College of Medicine, Cleveland, OH, USA.
| | - Veronica Issac
- Center for Adolescent Medicine, Cleveland Clinic Children's Hospital, A120, 9500 Euclid Avenue, Cleveland, OH 44195, USA
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Lira-Albarrán S, Larrea-Schiavon MF, González L, Durand M, Rangel C, Larrea F. The effects of levonorgestrel on FSH-stimulated primary rat granulosa cell cultures through gene expression profiling are associated to hormone and folliculogenesis processes. Mol Cell Endocrinol 2017; 439:337-345. [PMID: 27663078 DOI: 10.1016/j.mce.2016.09.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 09/19/2016] [Accepted: 09/19/2016] [Indexed: 12/18/2022]
Abstract
Levonorgestrel (LNG), a synthetic progestin, is used in emergency contraception (EC). The mechanism is preventing or delaying ovulation at the level of the hypothalamic pituitary unit; however, little knowledge exists on LNG effects at the ovary. The aim of this study was to identify the effects of LNG on FSH-induced 17β-estradiol (E2) production, including LNG-mediated changes on global gene expression in rat granulosa cells (GC). Isolated GC from female Wistar rats were incubated in vitro in the presence or absence of human FSH and progestins. At the end of incubations, culture media and cells were collected for E2 and mRNA quantitation. The results showed the ability of LNG to inhibit both hFSH-induced E2 production and aromatase gene expression. Microarray analysis revealed that LNG treatment affects GC functionality particularly that related to folliculogenesis and steroid metabolism. These results may offer additional evidence for the mechanisms of action of LNG as EC.
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Affiliation(s)
- Saúl Lira-Albarrán
- Department of Reproductive Biology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenida Vasco de Quiroga No. 15, Ciudad de México 14080, México.
| | - Marco F Larrea-Schiavon
- Department of Computational Genomics, Instituto Nacional de Medicina Genómica, Periférico Sur No. 4809, Ciudad de México 14610, México.
| | - Leticia González
- Department of Reproductive Biology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenida Vasco de Quiroga No. 15, Ciudad de México 14080, México.
| | - Marta Durand
- Department of Reproductive Biology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenida Vasco de Quiroga No. 15, Ciudad de México 14080, México.
| | - Claudia Rangel
- Department of Computational Genomics, Instituto Nacional de Medicina Genómica, Periférico Sur No. 4809, Ciudad de México 14610, México.
| | - Fernando Larrea
- Department of Reproductive Biology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Avenida Vasco de Quiroga No. 15, Ciudad de México 14080, México.
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23
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Moral Certitude in the Use of Levonorgestrel for the Treatment of Sexual Assault Survivors. PHILOSOPHY AND MEDICINE 2017. [DOI: 10.1007/978-3-319-55766-3_15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Smith NK, Cleland K, Wagner B, Trussell J. "I don't know what I would have done." Women's experiences acquiring ulipristal acetate emergency contraception online from 2011 to 2015. Contraception 2016; 95:414-418. [PMID: 27769767 DOI: 10.1016/j.contraception.2016.10.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 10/10/2016] [Accepted: 10/12/2016] [Indexed: 11/26/2022]
Abstract
OBJECTIVES This study describes women's reasons for seeking ulipristal acetate (UPA) for emergency contraception (EC) through the only authorized online retailer for UPA EC in the US. STUDY DESIGN Women aged 14 to 59 years, living in states that allow prescription medications to be shipped from out-of-state, accessed the KwikMed online pharmacy between January 2011 and December 2015. After completing a medical eligibility screener, women answered optional multiple-choice questions. To obtain UPA through KwikMed, individuals must be female, 50 years of age or younger, not currently pregnant or breastfeeding and not attempting to order UPA more than once within 30 days or more than four times per year. RESULTS Over the 5-year period, KwikMed provided 8019 prescriptions for UPA, and the number of women using this service more than tripled over time. Among women who responded to the survey questions (n=7133; response rate = 89%), most sought EC because of a condom failure (45.3%) or because they did not use regular contraception (41.2%). More than half (53.5%) of women reported that they chose UPA because of its effectiveness compared to levonorgestrel EC pills, and 58.9% preferred ordering UPA online because they found it easier than getting it from a doctor, clinic or pharmacy. CONCLUSIONS This study documents the importance of providing confidential services for acquiring EC online. Benefits of online access include convenience, less embarrassment, avoiding situations in which a provider might refuse to provide EC because of their own ideological belief and more reliable availability for this time-sensitive contraceptive. IMPLICATIONS Though physical, logistical and societal barriers can restrict women's access to EC, this study demonstrates that providing access to UPA online empowers women to obtain EC when they need it.
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Affiliation(s)
| | - Kelly Cleland
- Office of Population Research, Princeton University.
| | - Brandon Wagner
- Office of Population Research, Princeton University; Texas Tech University
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25
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26
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Batur P, Kransdorf LN, Casey PM. Emergency Contraception. Mayo Clin Proc 2016; 91:802-7. [PMID: 27261868 DOI: 10.1016/j.mayocp.2016.02.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Revised: 02/22/2016] [Accepted: 02/23/2016] [Indexed: 12/30/2022]
Abstract
Emergency contraception (EC) may help prevent pregnancy in various circumstances, such as contraceptive method failure, unprotected sexual intercourse, or sexual assault, yet it remains underused. There are 4 approved EC options in the United States. Although ulipristal acetate requires a provider's prescription, oral levonorgestrel (LNG) is available over the counter for women of all ages. The most effective method of EC is the copper intrauterine device, which can be left in place for up to 10 years for efficacious, cost-effective, hormone-free, and convenient long-term primary contraception. Ulipristal acetate tends to be more efficacious in pregnancy prevention than is LNG, especially when taken later than 72 hours postcoitus. The mechanism of action of oral EC is delay of ovulation, and current evidence reveals that it is ineffective postovulation. Women who weigh more than 75 kg or have a body mass index greater than 25 kg/m(2) may have a higher risk of unintended pregnancy when using oral LNG EC; therefore, ulipristal acetate or copper intrauterine devices are preferable in this setting. Providers are often unaware of the range of EC options or are unsure of how to counsel patients regarding the access and use of EC. This article critically reviews current EC literature, summarizes recommendations, and provides guidance for counseling women about EC. Useful tips for health care providers are provided, with a focus on special populations, including breast-feeding women and those transitioning to long-term contraception after EC use. When treating women of reproductive age, clinicians should be prepared to counsel them about EC options, provide EC appropriately, and, if needed, refer for EC in a timely manner.
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MESH Headings
- Administration, Oral
- Attitude of Health Personnel
- Body Mass Index
- Breast Feeding
- Contraception, Postcoital/adverse effects
- Contraception, Postcoital/economics
- Contraception, Postcoital/methods
- Contraceptive Agents, Female/administration & dosage
- Contraceptive Agents, Female/adverse effects
- Contraceptive Agents, Female/economics
- Contraceptive Agents, Female/supply & distribution
- Contraceptives, Postcoital/administration & dosage
- Contraceptives, Postcoital/adverse effects
- Contraceptives, Postcoital/economics
- Contraceptives, Postcoital/supply & distribution
- Female
- Health Knowledge, Attitudes, Practice
- Humans
- Intrauterine Devices, Copper/adverse effects
- Intrauterine Devices, Copper/economics
- Intrauterine Devices, Copper/supply & distribution
- Levonorgestrel/administration & dosage
- Levonorgestrel/adverse effects
- Levonorgestrel/economics
- Levonorgestrel/supply & distribution
- Nonprescription Drugs/economics
- Nonprescription Drugs/standards
- Nonprescription Drugs/supply & distribution
- Norpregnadienes/administration & dosage
- Norpregnadienes/adverse effects
- Norpregnadienes/economics
- Norpregnadienes/supply & distribution
- Ovulation/drug effects
- Patient Education as Topic/methods
- Pregnancy
- Prescription Drugs/economics
- Prescription Drugs/standards
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Affiliation(s)
- Pelin Batur
- Department of Internal Medicine, Primary Care Women's Health, Cleveland Clinic, Cleveland, OH
| | - Lisa N Kransdorf
- Division of Women's Health Internal Medicine, Mayo Clinic, Scottsdale, AZ
| | - Petra M Casey
- Department of Obstetrics and Gynecology, Mayo Clinic, Rochester, MN.
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Li H, Lo S, Ng E, Ho P. Efficacy of ulipristal acetate for emergency contraception and its effect on the subsequent bleeding pattern when administered before or after ovulation. Hum Reprod 2016; 31:1200-7. [DOI: 10.1093/humrep/dew055] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 02/22/2016] [Indexed: 12/30/2022] Open
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García-Calvente MDM, Lomas-Hernández V. Anticoncepción de urgencia y objeción de conciencia: un debate sin cerrar. GACETA SANITARIA 2016; 30:91-3. [DOI: 10.1016/j.gaceta.2015.12.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 12/04/2015] [Accepted: 12/21/2015] [Indexed: 01/18/2023]
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Peck R, Rella W, Tudela J, Aznar J, Mozzanega B. Does levonorgestrel emergency contraceptive have a post-fertilization effect? A review of its mechanism of action. LINACRE QUARTERLY 2016; 83:35-51. [PMID: 27833181 PMCID: PMC5102184 DOI: 10.1179/2050854915y.0000000011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND Recent studies have identified that levonorgestrel administered orally in emergency contraception (LNG-EC) is only efficacious when taken before ovulation. However, the drug does not consistently prevent follicular rupture or impair sperm function. OBJECTIVE The present systematic review is performed to analyze and more precisely define the extent to which pre-fertilization mechanisms of action may explain the drug's efficacy in pregnancy avoidance. We also examine the available evidence to determine if pre-ovulatory drug administration may be associated with post-fertilization effects. CONCLUSION The mechanism of action of LNG-EC is reviewed. The drug has no ability to alter sperm function at doses used in vivo and has limited ability to suppress ovulation. Our analysis estimates that the drug's ovulatory inhibition potential could prevent less than 15 percent of potential conceptions, thus making a pre-fertilization mechanism of action significantly less likely than previously thought. Luteal effects (such as decreased progesterone, altered glycodelin levels, and shortened luteal phase) present in the literature may suggest a pre-ovulatory induced post-fertilization drug effect. LAY SUMMARY Plan B is the most widely used emergency contraceptive available. It is important for patients and physicians to clearly understand the drug's mechanism of action (MOA). The drug was originally thought to work by preventing fertilization. Recent research has cast doubt on this. Our review of the research suggests that it could act in a pre-fertilization capacity, and we estimate that it could prevent ovulation in only 15 percent or less of cases. The drug has no ability to alter sperm function and limited ability to suppress ovulation. Further, data suggest that when administered pre-ovulation, it may have a post-fertilization MOA.
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Affiliation(s)
- Rebecca Peck
- Florida State University, College of Medicine, Daytona Beach, Florida, USA
| | - Walter Rella
- Institut für Medizinische Anthropologie und Bioethik (IMABE), Wien, Austria
| | - Julio Tudela
- Observatory Bioethics of the Catholic University of Valencia, Spain
| | - Justo Aznar
- Life Sciences Institute of the Catholic University of Valencia, Spain
| | - Bruno Mozzanega
- Gynecology in the Department of Woman's and Child's Health, University of Padua, Obstetrics and Gynecology Unit, University of Padova, Italy
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Schneider AP, Kubat C, Zainer CM. Appreciation for Analysis of how Levonorgestrel Works and Reservations with the use of Meloxicam as Emergency Contraception. Linacre Q 2016; 83:52-68. [DOI: 10.1080/00243639.2016.1145894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
This paper is a response to Dr. Kathleen Raviele's recent article on her critical analysis of the use of levonorgestrel given to women postsexual assault and her suggestion that the use of Meloxicam may be an ethical alternative.
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Affiliation(s)
| | - Christopher Kubat
- Catholic Social Services of Southern Nebraska, Lincoln, Nebraska, USA
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32
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Faúndes A, Osis MJ, Sousa MH, Duarte GA, Miranda L, Oliveira W. Physicians' information to patients and prescription of the emergency contraceptive pill according to their personal experience of using the method and perception of its mechanism of action. EUR J CONTRACEP REPR 2015; 21:176-82. [PMID: 26572173 DOI: 10.3109/13625187.2015.1111325] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
OBJECTIVES The aim of the study was to evaluate the association between physicians' understanding of the mechanism of action of the emergency contraceptive pill (ECP), their personal use of it, and their practice in informing their patients about the method and in prescribing it. METHODS The study was carried out in a sample of 3337 obstetrician-gynaecologists who responded to a mailed questionnaire. Bivariate analysis was used to test the association between physicians' personal use of the ECP, their understanding of its mechanism of action, and their practice in informing their patients about the method and in prescribing it. Multiple Poisson regression analysis was carried out to identify variables independently associated with the two dependent variables. RESULTS Multiple regression analysis showed that the percentage of physicians who had informed their patients about the ECP was significantly lower among those who had needed it themselves but had not used it and among those living in the northeast of Brazil. A significantly higher percentage of female than male physicians had provided information on the ECP. The percentage of physicians who had prescribed the ECP was significantly lower among those who had needed it themselves but had not used it and among those who believed that it caused a mini-abortion. The proportion of physicians who had ever-prescribed the ECP was greater among those who worked exclusively in private practice and among those who worked in a state capital. CONCLUSIONS The misconception that emergency contraception could cause a mini-abortion was associated with its denial to potential users, while physicians' personal experience of needing to use it favoured the likelihood of their informing potential users about it and prescribing it.
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Affiliation(s)
- Aníbal Faúndes
- a Department of Obstetrics and Gynaecology , University of Campinas (UNICAMP) , Campinas , SP , Brazil ;,b Centre of Research on Reproductive Health of Campinas (CEMICAMP) , Campinas , SP , Brazil
| | - Maria José Osis
- a Department of Obstetrics and Gynaecology , University of Campinas (UNICAMP) , Campinas , SP , Brazil ;,b Centre of Research on Reproductive Health of Campinas (CEMICAMP) , Campinas , SP , Brazil
| | - Maria Helena Sousa
- b Centre of Research on Reproductive Health of Campinas (CEMICAMP) , Campinas , SP , Brazil
| | - Graciana Alves Duarte
- b Centre of Research on Reproductive Health of Campinas (CEMICAMP) , Campinas , SP , Brazil
| | - Laura Miranda
- b Centre of Research on Reproductive Health of Campinas (CEMICAMP) , Campinas , SP , Brazil
| | - William Oliveira
- a Department of Obstetrics and Gynaecology , University of Campinas (UNICAMP) , Campinas , SP , Brazil ;,b Centre of Research on Reproductive Health of Campinas (CEMICAMP) , Campinas , SP , Brazil
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Abstract
There has been much debate regarding levonorgestrel emergency contraception's (LNG-EC's) method of action since 1999 when the Food and Drug Administration first approved its use. Proponents of LNG-EC have argued that they have moral certitude that LNG-EC works via a non-abortifacient mechanism of action, and claim that all the major scientific and medical data consistently support this hypothesis. However, newer medical data serve to undermine the consistency of the non-abortifacient hypothesis and instead support the hypothesis that preovulatory administration of LNG-EC has significant potential to work via abortion. The implications of the newer data have important ramifications for medical personnel, patients, and both Catholic and non-Catholic emergency room protocols. In the future, technology such as the use of early pregnancy factor may have the potential to quantify how frequently preovulatory LNG-EC works via abortion. Lay Summary: How Plan B (levonorgestrel emergency contraception) works has been vigorously debated ever since the Food and Drug Administration approved it in 1999. Many doctors and researchers claim that it has either no-or at most-an extremely small chance of working via abortion. However, the latest scientific and medical evidence now demonstrates that levonorgestrel emergency contraception theoretically works via abortion quite often. The implications of the newer data have important ramifications for medical personnel, patients, and both Catholic and non-Catholic emergency room rape protocols.
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Affiliation(s)
| | - Rebecca Peck
- Florida State University College of Medicine, FL, USA
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Contraceptive Use and the Risk of Ectopic Pregnancy: A Multi-Center Case-Control Study. PLoS One 2014; 9:e115031. [PMID: 25493939 PMCID: PMC4262460 DOI: 10.1371/journal.pone.0115031] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2014] [Accepted: 11/17/2014] [Indexed: 12/30/2022] Open
Abstract
Objective To evaluate the association between the risk of ectopic pregnancy (EP) and the use of common contraceptives during the previous and current conception/menstrual cycle. Methods A multi-center case-control study was conducted in Shanghai. Women diagnosed with EP were recruited as the case group (n = 2,411). Women with intrauterine pregnancy (IUP) (n = 2,416) and non-pregnant women (n = 2,419) were matched as controls at a ratio of 1∶1. Information regarding the previous and current use of contraceptives was collected. Multivariate logistic regression analyses were performed to calculate odds ratios (ORs) and the corresponding 95% confidential intervals (CIs). Results Previous use of intrauterine devices (IUDs) was associated with a slight risk of ectopic pregnancy (AOR1 = 1.87 [95% CI: 1.48–2.37]; AOR2 = 1.84 [1.49–2.27]), and the risk increased with the duration of previous use (P1 for trend <10−4, P2 for trend <10−4). The current use of most contraceptives reduced the risk of both unwanted IUP (condom: AOR = 0.04 [0.03–0.05]; withdrawal method: AOR = 0.10 [0.07–0.13]; calendar rhythm method: AOR = 0.54 [0.40–0.73]; oral contraceptive pills [OCPs]: AOR = 0.03 [0.02–0.08]; levonorgestrel emergency contraception [LNG-EC]: AOR = 0.22 [0.16–0.30]; IUDs: AOR = 0.01 [0.005–0.012]; tubal sterilization: AOR = 0.01 [0.001–0.022]) and unwanted EP (condom: AOR1 = 0.05 [0.04–0.06]; withdrawal method: AOR1 = 0.13 [0.09–0.19]; calendar rhythm method: AOR1 = 0.66 [0.48–0.91]; OCPs: AOR1 = 0.14 [0.07–0.26]; IUDs: AOR1 = 0.17 [0.13–0.22]; tubal sterilization: AOR1 = 0.04 [0.02–0.08]). However, when contraception failed and pregnancy occurred, current use of OCPs (AOR2 = 4.06 [1.64–10.07]), LNG-EC (AOR2 = 4.87 [3.88–6.10]), IUDs (AOR2 = 21.08 [13.44–33.07]), and tubal sterilization (AOR2 = 7.68 [1.69–34.80]) increased the risk of EP compared with the non-use of contraceptives. Conclusion Current use of most contraceptives reduce the risk of both IUP and EP. However, if the contraceptive method fails, the proportions of EP may be higher than those of non-users. In the case of contraceptive failure in the current cycle, EP cases should be differentiated according to current use of OCPs, LNG-EC, IUDs, and tubal sterilization. In addition, attention should be paid to women with previous long-term use of IUDs.
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Cleland K, Raymond EG, Westley E, Trussell J. Emergency contraception review: evidence-based recommendations for clinicians. Clin Obstet Gynecol 2014; 57:741-50. [PMID: 25254919 PMCID: PMC4216625 DOI: 10.1097/grf.0000000000000056] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Several options for emergency contraception are available in the United States. This article describes each method, including efficacy, mode of action, safety, side effect profile, and availability. The most effective emergency contraceptive is the copper intrauterine device (IUD), followed by ulipristal acetate and levonorgestrel pills. Levonorgestrel is available for sale without restrictions, whereas ulipristal acetate is available with prescription only, and the copper IUD must be inserted by a clinician. Although EC pills have not been shown to reduce pregnancy or abortion rates at the population level, they are an important option for individual women seeking to prevent pregnancy after sex.
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Affiliation(s)
- Kelly Cleland
- Office of Population Research, Princeton University, Princeton, NJ
| | | | | | - James Trussell
- Office of Population Research, Princeton University, Princeton, NJ
- The Hull York Medical School, University of Hull, Hull England
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Abstract
This review gives an overview of the mechanisms of action of oral emergency contraception pills (ECPs), focusing on the levonorgestrel (LNG) and ulipristal acetate (UPA) containing ECPs. In vivo and in vitro studies have addressed the effect of EC on various possible targets. Based on these studies as well as on clinical trials it is clear that the efficacy of ECPs to prevent an unintended pregnancy depends on their mechanism of action as well as on their use in relation to the fertile window. While the main effect of both available ECPs is to prevent or delay ovulation the window of action for UPA is wider than that of LNG. This provides the biological explanation for the difference observed in clinical trials and the higher efficacy of UPA. Neither LNG nor UPA impairs endometrial receptivity or embryo implantation. Correct knowledge on the mechanism of action of ECPs is important to avoid overestimating their effectiveness and to advise women on correct use.
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Affiliation(s)
- Kristina Gemzell-Danielsson
- Department of Women's and Children's Health, Division of Obstetrics and Gynecology, Karolinska Institutet, Karolinska University Hospital , Stockholm , Sweden
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Halpern V, Raymond EG, Lopez LM. Repeated use of pre- and postcoital hormonal contraception for prevention of pregnancy. Cochrane Database Syst Rev 2014; 2014:CD007595. [PMID: 25259677 PMCID: PMC7196890 DOI: 10.1002/14651858.cd007595.pub3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND Repeated use of postcoital hormonal contraception is not currently recommended due to the higher risk of side effects and lower contraceptive effectiveness compared to other modern methods of contraception. However, emerging evidence indicates renewed interest in a regular coitally-dependent method of oral contraception. We evaluated the existing data on safety and effectiveness of pericoital use of levonorgestrel and other hormonal drugs to prevent pregnancy. OBJECTIVES To determine the effectiveness and safety of repeated use of pre- and postcoital hormonal contraception for pregnancy prevention. SEARCH METHODS We searched until 1 September 2014 for trials that tested repeated pre- and postcoital use of hormonal drugs for pregnancy prevention. Databases included CENTRAL, MEDLINE, and POPLINE. We searched for current trials via ClinicalTrials.gov and ICTRP. For the initial review, we also searched EMBASE, CINAHL, and LILACS, and wrote to researchers to identify other trials. SELECTION CRITERIA We considered published and unpublished studies of repeated postcoital or immediately precoital use of hormonal drugs for contraception with pregnancy as an outcome. DATA COLLECTION AND ANALYSIS Two authors independently confirmed eligibility and extracted data from the included studies. We calculated confidence intervals (CI) around individual study Pearl indices using a Poisson distribution. We presented individual study estimates and pooled estimates and their 95% CI, where appropriate. MAIN RESULTS We found 22 trials that evaluated pericoital use of LNG and other hormonal drugs on a regular basis to prevent pregnancy. The studies included a total of 12,400 participants, and were conducted in Europe, Asia, and the Americas. The drugs and doses evaluated included levonorgestrel (LNG) 0.75 mg (11 studies), LNG in doses other than 0.75 mg (4 trials), and hormones other than LNG (7 trials). Outcomes included pregnancy rates, discontinuation, side effects, and acceptability.Pericoital levonorgestrel was reasonably efficacious and safe. The pooled Pearl Index for the 0.75 mg dose of LNG was 5.4 per 100 woman-years (95% CI 4.1 to 7.0). The pooled Pearl Index for all doses of LNG was 5.0 per 100 woman-years (95% CI 4.4 to 5.6). Other hormonal drugs appeared promising but most of them were not studied extensively. Menstrual irregularities were the most common side effects reported. However, the studies provided no consistent evidence of a relationship between bleeding abnormalities and either frequency of pill intake or total dose of the drug. Non-menstrual side effects were reportedly mild and not tabulated in most studies. Most women liked the pericoital method in spite of frequent menstrual irregularities. AUTHORS' CONCLUSIONS The studies of pericoital LNG regimens provided promising results but many had serious methodological issues. Most reports were decades old and provided limited information. However, we considered the evidence to be moderate quality because of the large number of participants from diverse populations, the low pregnancy rates, and the consistent results across studies. Rigorous research is still needed to confirm the efficacy and safety of pericoital use of LNG as a primary means of contraception among women with infrequent intercourse. If the method is shown to be efficacious, safe and acceptable, the results may warrant revision of the current World Health Organization recommendations and marketing strategies.
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Affiliation(s)
- Vera Halpern
- FHI 360Clinical Sciences359 Blackwell St, Suite 200DurhamNorth CarolinaUSA27701
| | | | - Laureen M Lopez
- FHI 360Clinical Sciences359 Blackwell St, Suite 200DurhamNorth CarolinaUSA27701
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Ko JKY, Huang VW, Li RHW, Yeung WSB, Ho PC, Chiu PCN. An in vitro study of the effect of mifepristone and ulipristal acetate on human sperm functions. Andrology 2014; 2:868-74. [PMID: 25168311 DOI: 10.1111/j.2047-2927.2014.00261.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 07/13/2014] [Accepted: 07/25/2014] [Indexed: 01/11/2023]
Abstract
Ulipristal acetate (UPA) and mifepristone are currently well-established agents for emergency contraception. Both drugs are selective progestogen receptor modulators which have been shown to have better efficacy than the widely used levonorgestrel in prevention of pregnancy. However, there is only limited information on the action of UPA on sperm function. The present study compared the in vitro biological effects of mifepristone and UPA on human sperm functions. Spermatozoa from semen samples with normal semen parameters were isolated. Capacitated spermatozoa were pre-incubated with 0.04, 0.4, 4 and 40 μM mifepristone or UPA for 1 h. Sperm motility, viability, DNA integrity, capacitation, spontaneous acrosome reaction, spontaneous hyperactivation, zona pellucida (ZP) binding capability and intracellular calcium concentration ([Ca(2+)]i) were determined. The effects of mifepristone and UPA on progesterone-induced acrosome reaction, hyperactivation and [Ca(2+)]i were also studied. Our results showed that mifepristone and UPA dose-dependently suppressed progesterone-induced acrosome reaction, hyperactivation and [Ca(2+)]i at concentrations ≥0.4 μM in human spermatozoa. Both compounds did not affect sperm motility, viability, DNA integrity, capacitation, spontaneous acrosome reaction, spontaneous hyperactivation, ZP binding capability and [Ca(2+)]i. This study demonstrated that UPA and mifepristone modulate human sperm functions by acting as progesterone antagonists. The results enable us to gain a better understanding of the mechanisms by which mifepristone and UPA work for emergency contraception, and provide a scientific basis for their clinical application.
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Affiliation(s)
- J K Y Ko
- Department of Obstetrics and Gynaecology, The University of Hong Kong, Queen Mary Hospital, Hong Kong, Hong Kong
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Li HWR, Lo SST, Ho PC. Emergency contraception. Best Pract Res Clin Obstet Gynaecol 2014; 28:835-44. [DOI: 10.1016/j.bpobgyn.2014.04.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 04/23/2014] [Accepted: 04/25/2014] [Indexed: 12/30/2022]
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Affiliation(s)
- Kelly Cleland
- 218 Wallace Hall, Office of Population Research, Princeton University, Princeton NJ 08648.
| | - Susan Wood
- Jacobs Institute of Women's Health, School of Public Health and Health Services, The George Washington University.
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Abstract
The Ethical and Religious Directives for Catholic Health Care Services allows the use of an emergency contraceptive for a woman who has been raped, as a defense against her attacker's sperm, provided the drug prevents fertilization and does not act against a conceived human life. Catholic emergency rooms around the country have been pressured to provide Plan B (LNG-EC) to patients seeking help after a sexual assault. Catholic bioethicists have supported the use of this drug based on their interpretation of the scientific literature regarding its mechanism of action. This paper presents a review of the mechanisms of action of LNG-EC when given during the fertile window, showing a high probability that it acts against human life rather than preventing fertilization, and proposes another class of drugs as a possible alternative.
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Monge ME, Dwivedi P, Zhou M, Payne M, Harris C, House B, Juggins Y, Cizmarik P, Newton PN, Fernández FM, Jenkins D. A tiered analytical approach for investigating poor quality emergency contraceptives. PLoS One 2014; 9:e95353. [PMID: 24748219 PMCID: PMC3991657 DOI: 10.1371/journal.pone.0095353] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Accepted: 03/25/2014] [Indexed: 11/18/2022] Open
Abstract
Reproductive health has been deleteriously affected by poor quality medicines. Emergency contraceptive pills (ECPs) are an important birth control method that women can use after unprotected coitus for reducing the risk of pregnancy. In response to the detection of poor quality ECPs commercially available in the Peruvian market we developed a tiered multi-platform analytical strategy. In a survey to assess ECP medicine quality in Peru, 7 out of 25 different batches showed inadequate release of levonorgestrel by dissolution testing or improper amounts of active ingredient. One batch was found to contain a wrong active ingredient, with no detectable levonorgestrel. By combining ultrahigh performance liquid chromatography-ion mobility spectrometry-mass spectrometry (UHPLC-IMS-MS) and direct analysis in real time MS (DART-MS) the unknown compound was identified as the antibiotic sulfamethoxazole. Quantitation by UHPLC-triple quadrupole tandem MS (QqQ-MS/MS) indicated that the wrong ingredient was present in the ECP sample at levels which could have significant physiological effects. Further chemical characterization of the poor quality ECP samples included the identification of the excipients by 2D Diffusion-Ordered Nuclear Magnetic Resonance Spectroscopy (DOSY 1H NMR) indicating the presence of lactose and magnesium stearate.
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Affiliation(s)
- María Eugenia Monge
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia, United States of America
| | - Prabha Dwivedi
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia, United States of America
| | - Manshui Zhou
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia, United States of America
| | - Michael Payne
- Product Quality and Compliance, FHI 360, Durham, North Carolina, United States of America
| | - Chris Harris
- Product Quality and Compliance, FHI 360, Durham, North Carolina, United States of America
| | - Blaine House
- Product Quality and Compliance, FHI 360, Durham, North Carolina, United States of America
| | - Yvonne Juggins
- Product Quality and Compliance, FHI 360, Durham, North Carolina, United States of America
| | - Peter Cizmarik
- Product Quality and Compliance, FHI 360, Durham, North Carolina, United States of America
| | - Paul N. Newton
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit, Microbiology Laboratory, Mahosot Hospital, Vientiane, Lao PDR
- Centre for Tropical Medicine, Churchill Hospital, University of Oxford, Oxford, United Kingdom
- WorldWide Antimalarial Resistance Network, Churchill Hospital, University of Oxford, Oxford, United Kingdom
| | - Facundo M. Fernández
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia, United States of America
| | - David Jenkins
- Product Quality and Compliance, FHI 360, Durham, North Carolina, United States of America
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Shohel M, Rahman MM, Zaman A, Uddin MMN, Al-Amin MM, Reza HM. A systematic review of effectiveness and safety of different regimens of levonorgestrel oral tablets for emergency contraception. BMC Womens Health 2014; 14:54. [PMID: 24708837 PMCID: PMC3977662 DOI: 10.1186/1472-6874-14-54] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Accepted: 03/30/2014] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Unintended pregnancy is a complex phenomenon which raise to take an emergency decision. Low contraceptive prevalence and high user failure rates are the leading causes of this unexpected situation. High user failure rates suggest the vital role of emergency contraception to prevent unplanned pregnancy. Levonorgestrel - a commonly used progestin for emergency contraception. However, little is known about its pharmacokinetics and optimal dose for use. Hence, there is a need to conduct a systematic review of the available evidences. METHODS Randomized, double-blind trials were sought, evaluating healthy women with regular menstrual cycles, who requested emergency contraception within 72 h of unprotected coitus, to one of three regimens: 1.5 mg single dose levonorgestrel, two doses of 0.75 mg levonorgestrel given 12 h apart or two doses of 0.75 mg levonorgestrel given 24 h apart. The primary outcome was unintended pregnancy; other outcomes were side-effects and timing of next menstruation. RESULTS Every trial under consideration successfully established the contraceptive effectiveness of levonorgestrel for preventing unintended pregnancy. Moreover, a single dose of levonorgestrel 1.5 mg for emergency contraception supports its safety and efficacy profile. If two doses of levonorgestrel 0.75 mg are intended for administration, the second dose can positively be taken 12-24 h after the first dose without compromising its contraceptive efficacy. The main side effect was frequent menstrual irregularities. No serious adverse events were reported. CONCLUSIONS The review shows that, emergency contraceptive regimen of single-dose levonorgestrel is not inferior in efficacy to the two-dose regimen. All the regimens studied were very efficacious for emergency contraception and prevented a high proportion of pregnancies if taken within 72 h of unprotected coitus. Single levonorgestrel dose (1.5 mg) can substitute two 0.75 mg doses 12 or 24 h apart. With either regimen, the earlier the treatment is given, the more effective it seems to be.
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Affiliation(s)
- Mohammad Shohel
- Department of Pharmaceutical Sciences, North South University, Dhaka 1229, Bangladesh
| | | | - Asif Zaman
- Department of Pharmaceutical Sciences, North South University, Dhaka 1229, Bangladesh
| | | | - Md Mamun Al-Amin
- Department of Pharmaceutical Sciences, North South University, Dhaka 1229, Bangladesh
| | - Hasan Mahmud Reza
- Department of Pharmaceutical Sciences, North South University, Dhaka 1229, Bangladesh
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Abstract
INTRODUCTION Although the contraceptive options for women have expanded considerably in the last decade, these methods are often not being offered to women as choices because clinicians are not well informed, limiting the ability of women to control their fertility. AREAS COVERED Areas covered include the use of oestradiol instead of ethinyl oestradiol and improved progestogens utilised in hormonal contraceptives, and new delivery systems have enabled the development of long-acting methods, which require less action on the part of the user, and thereby, reduce failure rates. Effective emergency contraceptive methods have become more readily available over the counter. However, male contraception, despite much research, still remains elusive. EXPERT OPINION This manuscript will provide an assessment of recent advances and controversies in contraception and make suggestions about improved availability.
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Affiliation(s)
- Edith Weisberg
- University of Sydney, Department of Obstetrics, Gynaecology and Neonatology , Camperdown, Sydney 2006 , Australia ,
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Gemzell-Danielsson K, Trussell J. UPA > LNG, but Not Good Enough. Contraception 2013; 88:585-6. [PMID: 24054969 PMCID: PMC4097116 DOI: 10.1016/j.contraception.2013.08.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Accepted: 08/10/2013] [Indexed: 12/30/2022]
Affiliation(s)
- Kristina Gemzell-Danielsson
- Department of Women's and Children's Health, Division of Obstetrics and Gynecology, Karolinska Institutet, Karolinska University Hospital, 171 76 Stockholm, Sweden
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Dermish AI, Turok DK. The copper intrauterine device for emergency contraception: an opportunity to provide the optimal emergency contraception method and transition to highly effective contraception. Expert Rev Med Devices 2013; 10:477-88. [PMID: 23895075 DOI: 10.1586/17434440.2013.811865] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Worldwide, 40% of all pregnancies are unintended. Widespread, over-the-counter availability of oral emergency contraception (EC) has not reduced unintended pregnancy rates. The EC visit presents an opportunity to initiate a highly effective method of contraception in a population at high risk of unintended pregnancy who are actively seeking to avoid pregnancy. The copper intrauterine device (IUD), the most effective method of EC, continues to provide contraception as effective as sterilization for up to 12 years, and it should be offered as the first-line method of EC wherever possible. Increased demand for and supply of the copper IUD for EC may have an important role in reducing rates of unintended pregnancy. The EC visit should include access to the copper IUD as optimal care but should ideally include access to all highly effective methods of contraception.
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Affiliation(s)
- Amna I Dermish
- Department of Obstetrics and Gynecology, University of Utah, Salt Lake City, UT, USA
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Anderson DC, Sullivan DM. Plan B and the German Catholic bishops. Ann Pharmacother 2013; 47:1079-80. [PMID: 23737514 DOI: 10.1345/aph.1s157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Germany's Catholic bishops recently ruled that levonorgestrel emergency contraception (EC) was acceptable for prevention of pregnancy in the case of rape. The ruling represents a significant change in Catholic doctrine that has been opposed to most forms of birth control. In their ruling the bishops cited a lack of evidence that levonorgestrel EC acts as an abortifacient. This case serves as a reminder of the need for bioethics to be based on current scientific literature as well as articles of faith and morals.
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Affiliation(s)
- Douglas C Anderson
- Department of Pharmacy Practice, School of Pharmacy, Cedarville University, Cedarville, OH, USA.
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Brache V, Cochon L, Deniaud M, Croxatto HB. Ulipristal acetate prevents ovulation more effectively than levonorgestrel: analysis of pooled data from three randomized trials of emergency contraception regimens. Contraception 2013; 88:611-8. [PMID: 23809278 DOI: 10.1016/j.contraception.2013.05.010] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 05/08/2013] [Accepted: 05/16/2013] [Indexed: 12/30/2022]
Abstract
BACKGROUND The days just prior to ovulation are the most crucial for emergency contraception (EC) efficacy. Ulipristal acetate (UPA) and levonorgestrel's (LNG) capacity to inhibit follicular rupture have never been compared directly at this time of the cycle. STUDY DESIGN Raw data from three pharmacodynamics studies with similar methodology were pooled to allow direct comparison of UPA, LNG and LNG + meloxicam's ability to prevent ovulation when administered orally in the advanced follicular phase, with a leading follicle of ≥ 18 mm. RESULTS Forty eight LNG-treated (1.5 mg) cycles, 31 LNG (1.5 mg) + meloxicam (15 mg), 34 UPA (30 mg) cycles and 50 placebo cycles were compared. Follicle rupture was delayed for at least 5 days in 14.6%, 38.7%, 58.8% and 4% of the LNG-, LNG + meloxicam-, UPA- and placebo-treated cycles, respectively. UPA was more effective than LNG and placebo in inhibiting follicular rupture (p = .0001), while LNG, when administered at this time of the cycle, was not different than placebo. The addition of meloxicam improved the efficacy of LNG in preventing follicular rupture (p = .0292 vs. LNG; p = .0001 vs. placebo; non-significant vs. UPA). UPA was effective in preventing rupture in the 5 days following treatment, even when administered at the time of the luteinizing hormone (LH) surge (UPA 79%, LNG 14% and placebo 10%). None of the treatments were effective when administered on the day of the LH peak. The median time from treatment to rupture was 6 days during the ulipristal cycles and 2 days in the placebo and LNG/LNG + meloxicam cycles (p = .0015). CONCLUSION Although no EC treatment is 100% effective in inhibiting follicular rupture when administered in the late follicular phase, UPA is the most effective treatment, delaying ovulation for at least 5 days in 59% of the cycles. LNG is not different from placebo in inhibiting follicular rupture at this advanced phase of the cycle. No treatment was effective in postponing rupture when administered on the day of LH peak.
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Gemzell-Danielsson K, Berger C, P.G.L. L. Emergency contraception — mechanisms of action. Contraception 2013; 87:300-8. [DOI: 10.1016/j.contraception.2012.08.021] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2012] [Accepted: 08/20/2012] [Indexed: 12/30/2022]
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