antiprogestin
Pronunciation: an′tē-prō-jes′tin
Definition: A substance that inhibits progesterone formation, that interferes with its carriage or stability in the blood, or that reduces its uptake by, or effects on, target organs (RU486, mifepristone).
Synonym(s): progesterone antagonist
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Examples: glitazone, GI cocktail, etc.

