Chorionic fusion and the occurrence of free-martins: a brief review.
D000818:Animals; D001165:Arteriovenous Malformations / Q000150:complications; D002417:Cattle; D002418:Cattle Diseases / Q000209:etiology*; D005321:Extraembryonic Membranes / Q000098:blood supply*; D005611:Freemartinism / Q000209:etiology*; D012756:Sheep; D012757:Sheep Diseases / Q000209:etiology*