So-called "combination" birth control pills function in contraception by
A) inhibiting the release of GnRH, FSH, and LH.
B) irritating the uterine lining so as to prevent implantation.
C) causing spontaneous abortions.
D) blocking progesterone receptors, so that pregnancy cannot be maintained.
E) binding to and inactivating any sperm that enter the oviduct.

Question

Quizplus · Accepted Answer

Combination birth control pills contain both estrogen and progestin, which work primarily by inhibiting the release of gonadotropin-releasing hormone (GnRH), follicle-stimulating hormone (FSH), and luteinizing hormone (LH) from the pituitary gland. This inhibition prevents ovulation, making pregnancy unlikely.

So-Called "Combination" Birth Control Pills Function in Contraception by