title: The in vitro formation of androstenedione from C 21  steroids by follicles isolated from human ovaries. A time study.
mesh_terms: D015068:17-Ketosteroids / Q000032:analysis / Q000096:biosynthesis; D006907:17-alpha-Hydroxypregnenolone / Q000032:analysis; D000328:Adult; D000731:Androstanes / Q000032:analysis / Q000096:biosynthesis*; D002247:Carbon Isotopes; D003460:Crystallization; D003687:Dehydroepiandrosterone / Q000032:analysis; D005260:Female; D006801:Humans; D006908:Hydroxyprogesterones / Q000032:analysis; D066298:In Vitro Techniques; D008875:Middle Aged; D006080:Ovarian Follicle / Q000378:metabolism*; D010053:Ovary / Q000378:metabolism; D011284:Pregnenolone / Q000378:metabolism*; D011374:Progesterone / Q000378:metabolism*; D013997:Time Factors; D014316:Tritium
chemical_list: D015068:17-Ketosteroids; D000731:Androstanes; D002247:Carbon Isotopes; D006908:Hydroxyprogesterones; D014316:Tritium; D006907:17-alpha-Hydroxypregnenolone; D003687:Dehydroepiandrosterone; D011374:Progesterone; D011284:Pregnenolone