Atresia ani in sheep.
D000818:Animals; D001006:Anus, Imperforate / Q000473:pathology / Q000662:veterinary*; D008531:Megacolon / Q000473:pathology / Q000662:veterinary; D012007:Rectum / Q000002:abnormalities; D012737:Sex Factors; D012756:Sheep; D012757:Sheep Diseases