Relationships of Leydig cell characteristics and intratesticular testosterone levels to sexual activity in the African elephant.
D000818:Animals; D001522:Behavior, Animal; D001835:Body Weight; D003593:Cytoplasm; D004606:Elephants; D007985:Leydig Cells; D008297:Male; D009929:Organ Size; D012725:Sexual Behavior; D013737:Testis / Q000032:analysis / Q000166:cytology*; D013739:Testosterone / Q000032:analysis / Q000502:physiology*
D013739:Testosterone