title: Hormonal regulation of reproduction and the antler cycle in the male Columbian black-tailed deer (Odocoileus hemionus columbianus). Part I. Seasonal changes in the histology of the reproductive organs, serum testosterone, sperm production, and the antler cycle.
mesh_terms: D000818:Animals; D000999:Antlers / Q000254:growth & development*; D003670:Deer / Q000502:physiology*; D005837:Genitalia, Male / Q000033:anatomy & histology*; D006733:Horns / Q000254:growth & development*; D008297:Male; D012621:Seasons; D013091:Spermatogenesis; D013739:Testosterone / Q000097:blood*
chemical_list: D013739:Testosterone