20-alpha-Dihydroprogesterone

**Definition:** A biologically active 20-alpha-reduced metabolite of PROGESTERONE. It is converted from progesterone to 20-alpha-hydroxypregn-4-en-3-one by the 20-ALPHA-HYDROXYSTEROID DEHYDROGENASE in the CORPUS LUTEUM and the PLACENTA.

**Tree numbers:** - D04.210.500.745.745.654.829.100 - D06.472.334.851.687.750.074

**Synonyms:** - 20 alpha-Hydroxy-4-Pregnen-3-One - 20 alpha-Hydroxyprogesterone - 20alpha-Hydroxypregn-4-Ene-3-One - Dihydroprogesterone - 20-alpha-Hydroxyprogesterone - 20 alpha-Dihydroprogesterone - Pregn-4-en-3-one, 20-alpha-hydroxy-