title: Plasma prolactin and luteinizing hormone during photoperiodically induced testicular growth and regression in starlings (Sturnus vulgaris).
mesh_terms: D000375:Aging; D000818:Animals; D001717:Birds; D003624:Darkness; D008027:Light; D007986:Luteinizing Hormone / Q000097:blood*; D008297:Male; D010507:Periodicity; D011388:Prolactin / Q000097:blood*; D013737:Testis / Q000254:growth & development*
chemical_list: D011388:Prolactin; D007986:Luteinizing Hormone