Progesterone

**Semantic type:** Hormone|Organic Chemical

**Definition:** Produced in the corpus luteum and by the placenta, as an antagonist of estrogens. Promotes proliferation of uterine mucosa and the implantation of the blastocyst, prevents further follicular development.

**Synonyms:** - Corpus Luteum Hormone - Delta4-pregnene-3,20-dione - Pregn-4-ene-3,20-dione - progesterone