How do combination birth control pills work to prevent pregnancy?

Question

Quizplus · Accepted Answer

Combination birth control pills work primarily by preventing ovulation, meaning that no egg is released to potentially be fertilized. They also thicken cervical mucus, making it more difficult for sperm to reach the egg if ovulation were to occur. Option A is incorrect as birth control pills do not physically block the cervix. Option B is incorrect as birth control pills do not release chemicals to deactivate sperm, although some forms of contraception such as spermicides do. Option D is incorrect as mucus does not form in the fallopian tubes.

How Do Combination Birth Control Pills Work to Prevent Pregnancy