title: Steroid hormone requirements for the maintenance of early pregnancy in sheep: a study using ovariectomized adrenalectomized ewes.
mesh_terms: D000085:Acetates; D000315:Adrenalectomy / Q000662:veterinary; D000818:Animals; D002369:Castration / Q000662:veterinary; D003348:Cortisone / Q000008:administration & dosage; D003900:Desoxycorticosterone / Q000008:administration & dosage; D004622:Embryo, Mammalian / Q000033:anatomy & histology; D004967:Estrogens / Q000502:physiology*; D004971:Estrus; D005260:Female; D007273:Injections, Intramuscular / Q000662:veterinary; D011247:Pregnancy; D011374:Progesterone / Q000008:administration & dosage / Q000502:physiology; D012756:Sheep / Q000502:physiology*
chemical_list: D000085:Acetates; D004967:Estrogens; D003900:Desoxycorticosterone; D011374:Progesterone; D003348:Cortisone