Question

Emergency contraceptives are effective if used within

• A. 72 hrs of coitus
• B. 72 hrs of ovulation
• C. 72 hrs of menstruation
• D. 72 hrs of implantation

Answer 1

Answer: (A)

72 hrs of coitus

Answer 2

Fertilization takes place after $24$ to $48$ hours of coitus and implantation takes place after $6-7$ days. If the morning after sex pill of the contraceptives is taken after $72$ hours they're not as effective.