Question

Emergency contraceptives are effective if used within 72 hours of ______.

Answer 1

Emergency contraceptives are effective if used within 72 hours of coitus.

Explanation:

Emergency contraceptives, such as pills containing progestogen and levonorgestrel, are effective when taken within 72 hours after unprotected sexual intercourse (coitus). They work by preventing or delaying ovulation and making the uterine environment unsuitable for implantation, thus reducing the chance of pregnancy if contraception failed or unprotected intercourse occurred.