title: Comparison of four levels of protein supplementation with and without oral DES on reproductive traits and testosterone of bulls.
mesh_terms: D000818:Animals; D001835:Body Weight; D002417:Cattle / Q000097:blood / Q000254:growth & development / Q000502:physiology*; D004044:Dietary Proteins / Q000008:administration & dosage*; D004054:Diethylstilbestrol / Q000494:pharmacology*; D008297:Male; D012098:Reproduction / Q000187:drug effects; D013076:Sperm Count; D013081:Sperm Motility; D013739:Testosterone / Q000097:blood*
chemical_list: D004044:Dietary Proteins; D013739:Testosterone; D004054:Diethylstilbestrol