title: The occurrence and apparent effect on reproduction of a constriction of the vagina in the merino ewe.
abstract: The incidence and effect on reproduction of a constriction of the vagina was studied in 12 maiden merino flocks on 5 commercial properties in Western Australia. The overall incidence of the constriction was 11% with a range of from 2% to 27%. Ewes with a constriction of the vagina exhibited inferior reproductive capacity; fewer ewes lambed and of those that did fewer reared their lambs. A higher lamb mortality was recorded in lambs born to such ewes.
mesh_terms: D000818:Animals; D003251:Constriction, Pathologic / Q000453:epidemiology / Q000503:physiopathology / Q000662:veterinary; D005260:Female; D005298:Fertility; D005313:Fetal Death / Q000662:veterinary; D011247:Pregnancy; D012756:Sheep; D012757:Sheep Diseases / Q000151:congenital* / Q000453:epidemiology / Q000503:physiopathology; D014621:Vagina / Q000002:abnormalities*