Contraception during perimenopause

Health benefits of combined oral contraceptives - a narrative review

PURPOSE

This review presents an update of the non-contraceptive health benefits of the combined oral contraceptive pill.

METHODS

We conducted a literature search for (review) articles that discussed the health benefits of combined oral contraceptives (COCs), in the period from 1980 to 2023.

RESULTS

We identified 21 subjective and/or objective health benefits of COCs related to (i) the reproductive tract, (ii) non-gynaecological benign disorders and (iii) malignancies. Reproductive tract benefits are related to menstrual bleeding(including anaemia and toxic shock syndrome), dysmenorrhoea, migraine, premenstrual syndrome (PMS), ovarian cysts, Polycystic Ovary Syndrome (PCOS), androgen related symptoms, ectopic pregnancy, hypoestrogenism, endometriosis and adenomyosis, uterine fibroids and pelvic inflammatory disease (PID). Non-gynaecological benefits are related to benign breast disease, osteoporosis, rheumatoid arthritis, multiple sclerosis, asthma and porphyria. Health benefits of COCs related to cancer are lower risks of endometrial cancer, ovarian cancer and colorectal cancer.

CONCLUSIONS

The use of combined oral contraceptives is accompanied with a range of health benefits, to be balanced against its side-effects and risks. Several health benefits of COCs are a reason for non-contraceptive COC prescription.

NOMAC-E2 compares to LNG combined oral contraceptives in women over forty: real-world PRO-E2 study

OBJECTIVE

To investigate safety and effectiveness of NOMAC-E2 and levonorgestrel-containing COCs (COC_LNG) in users over 40.

METHODS

In this large, observational study, new users¹ of NOMAC-E2 and COC_LNG were recruited in Europe, Australia, and Latin America and followed-up via questionnaires. Incidence of venous thromboembolism (VTE) was expressed as incidence rate (IR; events/10⁴ women-years [WY]). Unintended pregnancy was expressed by the Pearl Index (PI; contraceptive failures/100 WY). Mood and weight changes were defined as mean changes in mood score and percentage of body weight.

RESULTS

Overall, 7,762 NOMAC-E2 and 6,059 COC_LNG users over 40 were followed-up. NOMAC-E2 showed no increased VTE risk compared to COC_LNG; confirmed events: 5 NOMAC-E2 (IR 5.9; 95% CI, 1.9-13.7) vs 4 COC_LNG (IR 5.9; 95% CI, 1.6-15.1). Unintended pregnancy did not differ substantially between cohorts; confirmed events: 4 NOMAC-E2 (PI 0.05; 95% CI, 0.01-0.13) vs 5 COC_LNG (PI 0.08; 95% CI, 0.03-0.18). No differential effect on mood and weight was observed between cohorts.

CONCLUSIONS

NOMAC-E2 can be considered a valid alternative to COC_LNG in perimenopausal women.

Use of contraceptive methods and risk of unwanted pregnancy in Spanish women aged 40–50 years: results of a survey conducted in Spain

A survey intended to ascertain the rate of use and type of contraceptive methods applied by Spanish women aged 40 to 50 years, and to determine the proportion of women in this group at risk of an unwanted pregnancy, was designed and validated. To achieve representative national results for the study population, it was estimated that a sample size of 2000 women was required. Women were selected using probabilistic, stratified random sampling. The survey questionnaire was prepared by the research group with the collaboration of experts in the conduct of population studies of this type. Participants were interviewed face to face by qualified and trained staff from a specialised company external to the research group. Overall, 1039 women (52%) resorted to some contraceptive method, of which (male or female) sterilisation was the most common. We estimate that in Spain there are 840,000 women (31.8%) aged 40 to 50 years at risk of unwanted pregnancy.

Non-contraceptive health benefits of oral contraceptives

The use of combined oral contraceptives (COCs) is associated with a reduced risk of developing endometriosis, myomas, and endometrial and ovarian carcinoma. The mechanisms involved are multiple; next to ovulation suppression, a reduction in inflammation in the genital tract is involved. This is accomplished through inhibition of the endometrial expression of enzymes related to the biosynthesis of prostaglandin and oestrogen, particularly cyclooxygenase type II (Cox-2) and aromatase. The blockade of these enzymatic systems by COCs explains the beneficial effects of these compounds in treating the symptoms, and halting the progression of myomas, endometriosis and adenomyosis, all of which are characterized by increased inflammation. Inhibition of aromatase and Cox-2 expression in the endometrium by COCs may explain their efficacy in controlling the pain and excessive uterine bleeding caused by these pathologies. The reduction of inflammation in the endometrium may also be the mechanism behind the lower incidence of endometrial carcinoma in COC users. The blockade of ovulation and ovarian steroidogenesis, on the other hand, may explain the lesser incidence of ovarian cancer and the improvement of acne in users. In conclusion, inflammation appears to play a pivotal role in the development of various benign and malignant gynecological diseases. COCs reduce inflammation in the female genital tract by blocking enzymes such as Cox-2 and aromatase.

Perimenopausal contraception in Turkish women: A cross-sectional study

BACKGROUND

Epidemiologic research has shown that perimenopausal contraception is an important medical issue, because women during the perimenopause still need effective contraception. The objective of the study was to assess the contraceptive choices of perimenopausal Turkish women.

METHODS

This is a descriptive cross-sectional study that in a non - random fashion recruited 202 perimenopausal and naturally menopausal women who lived in a suburban area of Istanbul. Women who took part were aged between 45-59 years old. Chief database used to identify the suitable participants in the district. Subjects who voluntarily participated in the study were interviewed in their homes by the researcher. The analysis of the data was evaluated using percentages.

RESULTS

The percentage of sexually active women among the participants was 87.6%. A large majority - 80.2% - of the participants did not have any idea of when they should bring contraception to an end. The method most commonly used was withdrawal (Coitus Interruptus), represented by 38.8%. In regard to the participants' choices of medical contraception, those being utilized were the IUD (24.3%), tubal sterilization (8.9%), condom (5.9%) and COC (6.4%). Additionally, 18% of women used other traditional methods including vaginal lavage, vaginal aspirin, and even inserting a small sponge presoaked with fresh lemon juice or cola deep into the vagina. Among the perimenopausal women who participated, the IUD was the most popular and appropriate contraceptive method.

CONCLUSION

Most perimenopausal Turkish women are still using traditional methods and women's knowledge about contraception in the menopausal stages is very limited. Health professionals should provide information about perimenopausal contraception.