Answer: 72 hours.
- 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.
Contraceptive methods span a spectrum from temporary/natural to permanent/surgical; condoms stand out as the only method offering STI protection alongside contraception.
Concept context
Understand reproductive health, family planning, contraception methods, STIs, population control, and assisted reproductive technologies.