title: Prolonged gestation, elevated preparturitional plasma progesterone and reproductive aging in C57BL/6J mice.
mesh_terms: D000375:Aging; D000818:Animals; D005260:Female; D005313:Fetal Death; D006801:Humans; D008098:Litter Size; D008423:Maternal Age; D051379:Mice; D008815:Mice, Inbred Strains; D011247:Pregnancy; D011270:Pregnancy, Animal; D011374:Progesterone / Q000097:blood*
chemical_list: D011374:Progesterone