An abnormality of the spermatozoa of a stallion (Equus caballus).
D000818:Animals; D006734:Horse Diseases / Q000473:pathology*; D006736:Horses; D007248:Infertility, Male / Q000662:veterinary*; D008297:Male; D008854:Microscopy, Electron; D008928:Mitochondria; D009940:Organoids; D013094:Spermatozoa