title: Evidence for photoperiodic control of prolactin release in rams.
mesh_terms: D000818:Animals; D002369:Castration; D007273:Injections, Intramuscular; D008027:Light; D007986:Luteinizing Hormone / Q000378:metabolism; D008297:Male; D010507:Periodicity; D011388:Prolactin / Q000378:metabolism*; D011863:Radioimmunoassay; D012621:Seasons; D012756:Sheep / Q000502:physiology*; D013739:Testosterone / Q000494:pharmacology; D013997:Time Factors
chemical_list: D013739:Testosterone; D011388:Prolactin; D007986:Luteinizing Hormone