- A 24 hours
- B 48 hours
- C 72 hours
- D 96 hours
Correct answer: C. 72 hours
Explanation: Emergency contraceptive pills (morning-after pills) must be taken within 72 hours of unprotected intercourse. They prevent implantation by using high doses of estrogen or progesterone.
Concept context
Understand reproductive health, family planning, contraception methods, STIs, population control, and assisted reproductive technologies.