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Medical Term:


Pronunciation: prō-jes′tĕr-ōn

Definition: An antiestrogenic steroid, believed to be the active principle of the corpus luteum, isolated from the corpus luteum and placenta or synthetically prepared; used to correct abnormalities of the menstrual cycle, as a contraceptive, and to control habitual abortion.

Synonym(s): luteohormone, pregnancy hormone, progestational hormone