MANAGEMENT OF DYSTOCIA IN A COW HEIFER WITH CONGENITALSTENOSIS OF VULVA

摘要

A case of dystocia due to stenosis of vulva in a cow heifer and its management by episiotomy is reproted.Congenital causes of infertility are often inherited. They include developmental abnormalities of the ovary, oviduct, uterus, cervix, vagina and vulva. Some of these are lethal, a few have morphological while others have functional significance (Lagerlof, 1963). Stenosedarrow vulva, developmental defect is an unusual case of obliteration of caudal portion of the vagina and may be the cause of dystocia. An abnormally small vulva has been described as a cause of dystocia in Friesian and Jersey heifers and has been attributed to be of heriditary origin (Hull et al., 1940 and Arthur et al., 2001).