title: Source of progesterone prior to puberty in beef heifers.
mesh_terms: D000818:Animals; D002369:Castration; D002417:Cattle / Q000378:metabolism*; D005260:Female; D010053:Ovary / Q000166:cytology / Q000378:metabolism*; D011374:Progesterone / Q000096:biosynthesis* / Q000097:blood
chemical_list: D011374:Progesterone