Why Emergency Contraceptive Pills May Fail
Emergency contraceptive pills (ECPs) are a commonly used method for preventing pregnancy after unprotected sex. However, some women still become pregnant despite taking the pill. So, what causes this, and how can emergency contraceptive pills be used effectively?

Reasons for Pregnancy Despite Taking Emergency Contraceptive Pills
- Incorrect Timing of Use
Emergency contraceptive pills work best when taken as soon as possible after unprotected intercourse, ideally within 72 hours. If taken later, their effectiveness decreases significantly. - Intercourse During Ovulation
If unprotected sex happens during or near ovulation, the chances of pregnancy are much higher. In such cases, the pill may not effectively prevent fertilization. - Overuse of Emergency Contraceptive Pills
Frequent use of emergency contraception in a single menstrual cycle may reduce its effectiveness over time. - Quality and Type of Pills
Not all emergency contraceptive pills have the same effectiveness. Some brands or formulations may be less suitable for certain individuals. - Vomiting After Taking the Pill
If you vomit within two hours of taking the pill and do not take a replacement dose, the effectiveness may be compromised, increasing the risk of pregnancy.
How to Use Emergency Contraceptive Pills Effectively
- Take the pill as soon as possible: To maximize effectiveness, take the pill immediately after unprotected intercourse, within the recommended time frame.
- Avoid overuse: Limit emergency contraceptive use to no more than twice in one menstrual cycle to maintain effectiveness and avoid health risks.
- Use regular contraceptive methods: To prevent the need for emergency contraception, consider using reliable birth control options such as condoms, daily contraceptive pills, or intrauterine devices (IUDs).
Understanding the causes of emergency contraception failure and using the pills correctly will help women prevent unwanted pregnancies and maintain reproductive health.