title: Sharp increase in free circulating oestrogens immediately before parturition in sheep.
mesh_terms: D000818:Animals; D003429:Cross Reactions; D004958:Estradiol; D004967:Estrogens / Q000097:blood*; D004970:Estrone; D005260:Female; D007743:Labor, Obstetric; D011247:Pregnancy; D011270:Pregnancy, Animal; D011863:Radioimmunoassay; D012756:Sheep / Q000502:physiology*
chemical_list: D004967:Estrogens; D004970:Estrone; D004958:Estradiol