Medical Dictionary

antiprogestin

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noun an·ti·pro·ges·tin \-prō-ˈjest-ən\

Medical Definition of antiprogestin

  1. :  a substance (such as mifepristone) that inhibits the action of progesterone in the body RU-486 is an antiprogestin that is thought to compete with progesterone at the receptor site.—Charles Morgan, Nature, 15 Jan. 1987


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