Emergency contraceptive pills (ECPs) are hormonal medications used to prevent pregnancy after unprotected sexual intercourse or contraceptive failure. Often referred to as morning-after pills, they serve as a backup method, not a routine contraceptive. In Nigerian midwifery practice, clients frequently request ECPs due to condom breakage, missed regular pills, or sexual assault. Midwives must understand that ECPs will not disrupt an established pregnancy or cause an abortion, making them safe and acceptable for community distribution within the permitted timeframe.
Emergency contraceptive pills primarily work by delaying or preventing ovulation. If a woman has already ovulated before taking the pill, the hormones will not prevent fertilization or implantation. This biological reality explains why timing is critical. Levonorgestrel thickens cervical mucus to block sperm movement and alters the endometrium slightly, but its main superpower is stopping the release of the egg before sperm and egg can meet.
For levonorgestrel-only pills, maximum efficacy occurs when taken within 72 hours (3 days) of unprotected intercourse, though they retain some effect up to 120 hours (5 days). Ulipristal acetate maintains effectiveness for up to 120 hours. Midwives should counsel clients that taking the pill sooner yields a higher success rate. Vomiting within two hours of swallowing the pill means the client likely absorbed insufficient hormone, requiring a repeat dose.
Common side effects include temporary nausea, lower abdominal pain, fatigue, and irregular vaginal spotting or a delayed next menstrual period. Midwives must reassure clients that a period arriving within a week of its expected date is normal, but a delay beyond one week warrants a pregnancy test. Effective counseling must also cover the initiation of a regular, ongoing contraceptive method since ECPs offer zero protection for future acts of intercourse.