title: Temporal changes in serum progesterone in aging female rats.
mesh_terms: D000375:Aging; D000818:Animals; D004031:Diestrus; D004971:Estrus; D005260:Female; D011247:Pregnancy; D011359:Proestrus; D011374:Progesterone / Q000097:blood*; D011555:Pseudopregnancy / Q000097:blood; D051381:Rats
chemical_list: D011374:Progesterone