title: Effect of active immunization of the cyclic ewe against oestradiol-17beta.
mesh_terms: D000818:Animals; D004958:Estradiol / Q000097:blood / Q000276:immunology / Q000502:physiology*; D004971:Estrus; D005260:Female; D007114:Immunization; D007986:Luteinizing Hormone / Q000097:blood; D011247:Pregnancy; D011374:Progesterone / Q000097:blood; D012756:Sheep / Q000502:physiology*
chemical_list: D011374:Progesterone; D004958:Estradiol; D007986:Luteinizing Hormone