title: Mechanism by which progesterone shortens the estrous cycle of the ewe.
mesh_terms: D000818:Animals; D004958:Estradiol / Q000097:blood; D004971:Estrus / Q000187:drug effects*; D005260:Female; D007700:Kinetics; D007986:Luteinizing Hormone / Q000097:blood; D010053:Ovary / Q000098:blood supply; D011247:Pregnancy; D011374:Progesterone / Q000097:blood / Q000494:pharmacology*; D011460:Prostaglandins F / Q000097:blood; D012756:Sheep / Q000502:physiology*; D014599:Uterus / Q000098:blood supply
chemical_list: D011460:Prostaglandins F; D011374:Progesterone; D004958:Estradiol; D007986:Luteinizing Hormone