Implantable contraception

Early discontinuation of the IMPLANON® and associated factors in Ethiopia, systematic review and meta-analysis

Background

Implanon® is a commonly used effective long-acting reversible contraceptive method. It provides contraception for up to three years. Its early discontinuation was associated with an unwanted pregnancy, abortion, and socioeconomic burden. Thus, the main aim of this systematic review and meta-analysis is to determine the rate of early discontinuation of Implanon® and associated factors in Ethiopia.

Method

This Systematic review and meta-analysis was performed by using online databases including PubMed, Google Scholar, Cochrane, HINARI, Web of Science, and other gray and online repositories of Ethiopian Universities. The JOANNA Briggs Institute standard data extraction and appraising sheet format was used for the extraction of all included studies. To test the heterogeneity of the studies the Cochran Q test and I² statistics test were used. The Funnel plot and Egger's tests were used to detect possible publication biases of the included studies. The forest plots were used to present the finding of the overall prevalence of the early Implanon® discontinuation and the odds ratio (OR) along with a 95% CI.

Result

In this systematic review and meta-analysis seven studies with a total population of 3161 women using Implanon® were included. The overall pooled early Implanon® discontinuation rate was 31.34% (95%CI: 19.20, 43.47). Early discontinuation of Implanon® was associated with lack of counseling during service delivery 2.55times (OR: 2.55, 95%CI: 1.99, 3.25), the experienced side effect 3.25 times (OR: 3.25, 95%CI: 2.48, 4.24), absence of appointment after insertion 6.06 times (OR: 6.06, 95%CI: 2.15, 17.05), others decision on the women's choice 3.30 times (OR = 3.30, 95%CI: 2.52, 4.32), and lack the satisfaction of provided service 2.68 times (OR: 2.68, 96%CI: 1.61, 4.45).

Conclusion

About one-third of the women in Ethiopia discontinue the use of Implanon® within one year of the insertion. This is high compared to findings from other countries. Lack of counseling about the service, women's experience of the side effect, absence of the appointment following the service provision, other decisions on the method chosen, and lack of satisfaction were factors associated with the discontinuation of Implanon®. Hence, efforts should be made to reduce the rate of early discontinuation of Implanon® through drafting national guidelines and strategies accompanied by appropriate implementation, follow-up to foster adequate counseling, arrangement of appointments, helping women to decide on the choice, and increase the quality of care provision to enhance the satisfaction of the service.

Wearable Devices and Intelligent Application in Women's Postpartum Repair for Smart Healthcare

Wearable devices are more and more widely used in the field of smart healthcare. The purpose of this study was to explore the effect of contraceptive counseling and education on contraceptive behavior of women after induced abortion. The investigators will explain the situation of this topic to the respondents and select the respondents in strict accordance with the framework requirements of sampling design. All the data are from the induced abortion women in the first-, second-, and third-level hospitals, which reduces the selection bias of the respondents. It is found that the proportion of induced abortion among college students is the highest, reaching 66.03%. This study is helpful to reduce the incidence of unwanted pregnancy, induced abortion, and repeated abortion and improve the reproductive health of women.

Effects of doxycycline on serum and endometrial levels of MMP-2, MMP-9 and TIMP-1 in women using a levonorgestrel-releasing subcutaneous implant

BACKGROUND

Endometrial spotting and/or bleeding (ESB) occurs in levonorgestrel subcutaneous implant (LNG SI) users. Matrix metalloproteinases (MMPs) may play a role in ESB.

STUDY DESIGN

Women between 18 and 40 years with regular menstrual cycles had a baseline evaluation followed by LNG SI insertion and randomization to doxycycline (DOX; 20 mg) or placebo (PL) twice a day. MMP-2, MMP-9 and tissue inhibitor of MMP-1 (TIMP-1) in serum and the endometrium were estimated at baseline and at 1, 3 and 6 months after insertion.

RESULTS

LNG increased serum MMP-9, while DOX decreased MMP-9 levels compared to PL after 1 month (p<.05). DOX decreased endometrial MMP-9 at 1 and 6 months compared to baseline and PL (p<.05). DOX increased endometrial TIMP-1 at 6 months compared with baseline and PL (p<.05). MMP-2 levels were unchanged.

CONCLUSION

LNG SI increased serum MMP-9 and TIMP-1 levels, while DOX decreased both serum and endometrial MMP-9 levels.

Recent advances in hormonal contraception

PURPOSE OF REVIEW

The rapid increase in the world population makes it mandatory to develop new contraceptive methods. Disseminating reversible inexpensive and practical hormonal methods to developing countries is a target of many international agencies and funds.

RECENT FINDINGS

The safety of combined oral contraceptives is the main issue. The main guideline is to find women at risk before prescribing combined oral contraceptives. Lowering the estrogen dose should be attempted. New progestins are emerging, but their safety can be assessed only retrospectively. There is an increasing trend to extend the cycles in order to have fewer bleeding days. Progestin-only contraception seems safer than estrogen-progestin combinations in relation to thromboembolic events. A new progestin-only pill and the levonorgestrel intrauterine system have a good acceptability and high continuation rate. New administration methods are being developed and the possible role of mifepristone has been investigated.

SUMMARY

There are more contraceptive choices available than ever before. To educate healthcare providers as to the methods available and to inform and educate consumers are cornerstones for successful contraception.

Effects of a subdermal levonorgestrel contraceptive implant (Norplant) on serum cholesterol, triglycerides, ALT and AST in Iranian women

BACKGROUND

To evaluate the effects of Norplant (36 mg of levonorgestrel, six capsules) on serum cholesterol, triglycerides, alanine transaminase (ALT) and aspartate transminase (AST), we enrolled 465 healthy women from Zahedan, Iran, into a longitudinal study.

MATERIALS AND METHODS

Blood samples were collected after an overnight fast before implant insertion and after 3, 6, 9 and 12 months of use.

RESULTS

Total cholesterol and triglyceride levels did not significantly change during Norplant use. Although there were statistically significant increases in ALT and AST levels during Norplant use, the values were within the reference range.

Role of progestins in contraception

Progestins have been used for contraception for more than 30 years. The main goal was to develop a contraceptive method devoid of the metabolic or clinical side-effects associated with the use of estrogens. The development of new contraceptive methods and formulations is time-consuming and requires devotion, belief, and also strong economical basis. As a result of this endeavor new methods have been developed: oral progestins, implants, injectables, intrauterine hormonal systems, and vaginal rings. Progestin-only contraceptives may be preferable in some situations, which have absolute or relative contraindications to estrogen, side-effects to estrogen containing hormonal contraception, lactation, and comfort and feasibility of formulations for long-term use. At present, emergency contraception is also performed with progestin.

Risks and benefits, advantages and disadvantages of levonorgestrel-releasing contraceptive implants

Levonorgestrel-releasing implants are long acting contraceptives, approved for 5 years of continuous use. Two marketed systems, the six capsule Norplant use of tradenames is for product identification purposes only and does not imply endorsement. and the two rod Jadelle, have essentially equal rates of drug release, pregnancy and adverse events over 5 years of use. Randomised clinical trials and controlled cohort observations indicate that for the first 3 years, when pregnancy rates are at or almost zero, no other contraceptive system is more effective, although etonogestrel implants provide equal effectiveness. Annual pregnancy rates rise in the fifth year of continuous use but remain below 1 per 100 women. Annual pregnancy rates of Norplant users remain below 1 per 100 throughout 7 years of continuous use. Levonorgestrel implants provide low progestogen doses; 40-50 microg/day at 1 year of use, decreasing to 25-30 microg/day in the fifth year. Serum levels of levonorgestrel at 5 years are 60-65% of those levels measured at 1 month of use. Adverse effects with levonorgestrel implants are similar to those observed with progestogen only and combined oral contraceptives. Risks of ectopic pregnancy, other pregnancy complications and pelvic inflammatory disease are reduced in comparison with those of women using copper or non-medicated intrauterine devices. Risks of developing gallbladder disease and hypertension or borderline hypertension, although small, are about 1.5 and 1.8 times greater, respectively, in women using levonorgestrel implants than in women not using hormonal contraception. Other serious diseases have not been found to occur significantly more frequently in levonorgestrel implant users than in women not using hormonal contraception. The great majority of levonorgestrel implant users experience menstrual problems, but serious bleeding problems are not more frequent than in controls. Other health problems reported more frequently by levonogestrel implant users than by women not using hormonal contraception in a study of 16000 women included skin conditions, headache, upper limb neuropathies, dizziness, nervousness, malaise, minor visual disturbances, respiratory conditions, arthropathies, weight change, anxiety and non-clinical depression. Clinical depression is not more frequent in women using implants compared with those not using hormonal contraception (i.e. using intrauterine devices, sterilisation). Removal problems occur less frequently with Jadelle than with Norplant. The mean removal time for Jadelle is half that of Norplant. Levonorgestrel implants in nationally representative scientific samples, in randomised trials, and in controlled cohort studies have continuation rates as high as or higher than any other reversible contraceptive over a duration of 5 years. This would imply that the satisfaction women derive from the contraceptive effectiveness of levonorgestrel implants greatly outweighs the dissatisfaction that may accompany menstrual disturbances and other adverse effects associated with implants.

Economics of family planning and birth control

The 50th anniversary of the Pill proves a useful setting against which to consider developments in contraception and birth control. However, differentials between the demands placed on health services and the resources available to meet such needs continue to be major headaches for those involved in policy making and the planning, provision and delivery of services. This review considers the cost-effectiveness of contraception and in particular, long-term reversible devices, which are effective in preventing unintended pregnancies and avoid the need for compliance. The paper discusses the cost-effectiveness of contraceptives and the economic benefits generated when unintended pregnancies are avoided. It also highlights the major inequities that exist in access to contraceptives on a global basis and highlights the need to increase provision in developing countries.

Vaginal bleeding disturbances and implantable contraceptives

Implantable contraceptives allow safe and effective fertility regulation for up to 5 years. Currently available devices release low doses of progestogens. Disruption of vaginal bleeding patterns is almost inevitable, particularly during the initial months of use. Irregular and prolonged bleeding as well as amenorrhea are common. Irregular bleeding is unpopular with most women and unacceptable to some. This review describes the vaginal bleeding disturbances induced by modern implantable contraceptives and discusses the implications of these in terms of method use and discontinuations. The cause of the irregular bleeding is not fully understood, but recent evidence suggests that an increase in endometrial vascular fragility might precipitate vessel breakdown and, hence, breakthrough bleeding. This review discusses this evidence and outline the possible mechanisms underlying breakthrough bleeding associated with implantable contraceptives. In addition, therapies for bleeding disturbances are described and their efficacy reviewed.

Endometrial effects of etonogestrel (Implanon) contraceptive implant

The subdermal contraceptive implant etonogestrel (Implanon; NV Organon International, Oss, The Netherlands) exerts complex effects on the endometrium. These include direct effects on the endometrium through endometrial progestin target sites, and indirect effects through suppression of the hypothalamic-pituitary-ovarian axis. The resulting effects are categorized by alterations in endometrial histology, endometrial thickness, dysmenorrhoea and menstrual bleeding pattern. The exact mechanism of action of progestins on the endometrium has not been determined. The contraceptive effect in Implanon users is mainly due to inhibition of ovulation. Current research is concentrating on the potential of the progestin implant to modify endometrial vascular, angiogenic, steroid receptor and proto-oncogene function. These processes may be involved in the causation of progestin-induced breakthrough bleeding.