What is the primary way that combination birth control pills work to prevent pregnancy?
A) They create an artificial barrier to the cervix.
B) They release chemicals that deactivate sperm.
C) They prevent ovulation and thicken cervical mucus.
D) They cause mucus to form in the Fallopian tubes, blocking fertilization.

Question

Quizplus · Accepted Answer

Combination birth control pills contain both estrogen and progestin, which work together to prevent ovulation (the release of an egg from the ovary). Without ovulation, there is no egg available for fertilization by sperm. In addition, the hormones also thicken cervical mucus, making it more difficult for sperm to reach the fallopian tubes where fertilization typically occurs. This dual mechanism of action makes combination birth control pills highly effective at preventing pregnancy when used as directed.

What Is the Primary Way That Combination Birth Control Pills