title: Role of embryonic signals in the establishment of pregnancy.
mesh_terms: D000818:Animals; D002417:Cattle; D006063:Chorionic Gonadotropin / Q000502:physiology; D003340:Corpus Luteum Maintenance; D004622:Embryo, Mammalian / Q000276:immunology / Q000378:metabolism / Q000502:physiology*; D047108:Embryonic Development; D005260:Female; D005313:Fetal Death; D006168:Guinea Pigs; D006801:Humans; D008431:Maternal-Fetal Exchange; D051379:Mice; D011247:Pregnancy; D011374:Progesterone / Q000097:blood / Q000502:physiology; D011817:Rabbits; D051381:Rats; D012756:Sheep; D013552:Swine; D014599:Uterus / Q000276:immunology / Q000502:physiology
chemical_list: D006063:Chorionic Gonadotropin; D011374:Progesterone