title: Relationship of daylength and prolactin to resumption of reproductive activity in anestrous ewes.
mesh_terms: D000780:Anestrus; D000818:Animals; D004971:Estrus; D005260:Female; D008027:Light; D011247:Pregnancy; D011374:Progesterone / Q000097:blood; D011388:Prolactin / Q000097:blood / Q000502:physiology*; D012098:Reproduction; D012756:Sheep / Q000502:physiology*
chemical_list: D011374:Progesterone; D011388:Prolactin