A study of breastfeeding and the return of menses and pregnancy in Karachi, Pakistan

Effectiveness of Lactational Amenorrhea Method in Ethiopia: A Multi-Center Prospective Cohort Study

Background

Although the lactational amenorrhea method (LAM) is one of the most commonly used contraception methods during the first six months of a woman's postpartum period, there has been little research on its effectiveness in general and particularly in Ethiopia. The purpose of this study was to evaluate the effectiveness of LAM and the experiences of Ethiopian women who used it.

Methods

This was a multi-center prospective cohort study of postpartum women from five Ethiopian regions and one city administration. All pregnant women who gave birth in these randomly selected hospitals and five health centers directly referring to the hospitals were invited to the study if they selected LAM and were followed monthly at home. Each month, trained researchers visited the woman at her home and collected information about breast feeding, the return of menses, the resumption of sex, the use of another contraceptive, and a pregnancy test using urine human chorionic gonadotropin (hCG). Women who reported starting new contraceptive methods, resumption of menses, starting complementary feeding, neonatal death, getting pregnant, or refusing were excluded from the cohort. The data were collected using ODK Collect and exported to Stata 14 for analysis.

Results

Among the 2162 women who selected LAM as a contraceptive, 2022 were enrolled in the cohort study, and 901 completed the follow-up. At the end of the sixth month, eight women got pregnant, corresponding to an effectiveness of 99.1%. More than half of the cohort were excluded from the follow-up for reasons of transitioning to other types of contraception, resumption of menses, or refusal to follow-up.

Conclusion

The effectiveness of LAM is high and should be recommended for postpartum women, with proper counseling provided. A study should be conducted to examine the effectiveness of breast feeding as a contraceptive beyond the Bellagio consensus.

Postpartum Sexuality and the Lactational Amenorrhea Method for Contraception

This chapter reviews the literature on postpartum coital behavior, anovulatory and ovulatory bleeding episodes, and the methodology and efficacy of Lactational Amenorrhea Method and progesterone-only oral contraceptives. Of interest is the finding that breastfeeding women may resume coital behavior earlier postpartum, but report increased discomfort over time. The high efficacy of the Lactational Amenorrhea Method is confirmed and data illustrating possible relaxation of some criteria are presented. The conflicting guidance of CDC and WHO concerning immediate postpartum use of progestin-only methods is presented. The dearth of recent studies calls for new research on these topics.

Contraceptive efficacy of lactational amenorrhoea

Pregnancy is rare among breastfeeding women with lactational amenorrhoea. The lactational amenorrhoea method (LAM) is the informed use of breastfeeding as a contraceptive method by a woman who is still amenorrhoeic, and who is not feeding her baby with supplements, for up to 6 months after delivery. Under these three conditions, LAM users are thought to have 98% protection from pregnancy. It can be difficult, however, to determine when supplementation of the baby's diet begins. We have analysed data from nine studies of the recovery of fertility in breastfeeding women to assess the effectiveness of lactational amenorrhoea alone, irrespective of whether supplements have been introduced, as a fertility regulation method post partum. Cumulative probabilities of ovulation during lactational amenorrhoea were 30.9 and 67.3 per 100 women at 6 and 12 months, respectively, compared with 27.2 at 6 months when all three criteria of the LAM were met. Cumulative pregnancy rates during lactational amenorrhoea were 2.9 and 5.9 per 100 women at 6 and 12 months, compared with 0.7 at 6 months for the LAM. The probability of pregnancy during lactational amenorrhoea calculated from these studies is similar to that of other modern contraceptive methods, and it seems reasonable for a woman to rely on lactational amenorrhoea without regard to whether she is fully or partly breastfeeding. So that amenorrhoea and fertility suppression can be maintained, counselling about good breastfeeding and weaning practices remains important.