Which statement regarding birth control is true?

A) The most widely used birth control pills contain a combination of FSH and LH.
B) Natural family planning is generally reliable.
C) Morning-after pills taken within 3 days of unprotected intercourse prevent fertilization or implantation about 75% of the time.
D) Birth control pills work primarily by preventing fertilization and implantation.


Answer: C

Biology & Microbiology

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