title: Impaired preparturitional rise of plasma estradiol in aging C57BL/6J mice.
mesh_terms: D000375:Aging; D000818:Animals; D004958:Estradiol / Q000097:blood*; D005260:Female; D008098:Litter Size; D051379:Mice; D011247:Pregnancy; D011270:Pregnancy, Animal; D013997:Time Factors
chemical_list: D004958:Estradiol