title: Serum prolactin levels in castrated rams at various times of the year and during treatment with androgens or oestrogen.
abstract: Prolactin concentrations were measured in serum from wethers at various times of the year before and during treatment with testosterone proprionate, dihydrotestosterone propionate, 19-hydroxytestosterone dipropionate and oestradiol dipropionate. Levels of prolactin in serum were lower in untreated wethers during short (October) than during long (April-August) days. Seasonal differences persisted throughout the experiment but became less obvious during tretment with oestradiol dipropionate and 19-hydroxytestosterone dipropionate, both of which raised prolactin concentrations. Neither testosterone propionate nor dihydrotestosterone propionate altered the levels of prolactin.
mesh_terms: D000728:Androgens / Q000494:pharmacology*; D000818:Animals; D002369:Castration; D013196:Dihydrotestosterone / Q000494:pharmacology; D004958:Estradiol / Q000494:pharmacology*; D005260:Female; D006915:Hydroxytestosterones / Q000494:pharmacology; D011388:Prolactin / Q000097:blood*; D012621:Seasons; D012756:Sheep / Q000097:blood*; D013268:Stimulation, Chemical; D013739:Testosterone / Q000494:pharmacology
chemical_list: D000728:Androgens; D006915:Hydroxytestosterones; D013196:Dihydrotestosterone; D013739:Testosterone; D004958:Estradiol; D011388:Prolactin