Postcoital contraception with combined oral contraceptives:
1. requires that the first dose be taken within 120 hours of unprotected intercourse.
2. requires that the woman take second and third doses at 24 and 36 hours after the first dose.
3. has an effectiveness rate in preventing pregnancy of approximately 50%.
4. is commonly associated with the side effect of menorrhagia.
1
1. Correct. Emergency contraception is used within 120 hours of unprotected intercourse to prevent pregnancy.
2. Incorrect. The first dose of an emergency contraception should be taken within 120 hours postcoitus, with the second dose 12 hours later.
3. Incorrect. Postcoital use is between 75% and 89% effective at preventing pregnancy.
4. Incorrect. The common side effect to postcoital contraception is nausea.
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