How does the oral contraceptive, mifepristone, block the action of progesterone?
A) by binding to the receptor sites of progesterone
B) by inhibiting the synthesis of progesterone
C) by converting the excess progesterone into cholesterol
D) by breaking down the progesterone molecules present in the body

Question

Quizplus · Accepted Answer

Mifepristone is a progesterone receptor antagonist, which means it binds to the receptor sites of progesterone and blocks its action. This results in the breakdown of the endometrium and the inhibition of implantation, which is an effective method of contraception.

How Does the Oral Contraceptive, Mifepristone, Block the Action of Progesterone