title: Progesterone in male white-crowned sparrows, Zonotrichia leucophrys gambelii.
mesh_terms: D000375:Aging; D000818:Animals; D001717:Birds / Q000097:blood*; D003624:Darkness; D013196:Dihydrotestosterone / Q000097:blood; D008027:Light; D007986:Luteinizing Hormone / Q000097:blood; D008297:Male; D011374:Progesterone / Q000097:blood*; D012621:Seasons; D013737:Testis / Q000254:growth & development; D013739:Testosterone / Q000097:blood
chemical_list: D013196:Dihydrotestosterone; D013739:Testosterone; D011374:Progesterone; D007986:Luteinizing Hormone