Emergency contraception methods are effective for up to how many days after unprotected intercourse?

Emergency contraception methods, such as the copper intrauterine device (IUD) and certain hormonal pills, are effective for up to 5 days (120 hours) after unprotected intercourse. Specifically, the copper IUD can be used as emergency contraception and is the most effective option available, providing high efficacy in preventing pregnancy if inserted within this time frame.

While some hormonal emergency contraceptive pills may be effective up to 72 hours (3 days) after intercourse, the overarching guideline for emergency contraception encompasses a broader window of 5 days for the copper IUD. This efficacy is based on the ability to prevent ovulation, fertilization, or the implantation of a fertilized egg, making the 5-day window crucial for maximizing the chances of preventing an unintended pregnancy.