Gonadal and extra gonadal sperm numbers during reproductive development of holstein bulls.
D000818:Animals; D000831:Animals, Newborn / Q000502:physiology; D002417:Cattle / Q000254:growth & development / Q000502:physiology*; D008297:Male; D009929:Organ Size; D012098:Reproduction / Q000502:physiology*; D013094:Spermatozoa; D013737:Testis / Q000032:analysis*