OMIA 000084-9940 : Atresia ani vaginalis in Ovis aries

Mendelian trait/disorder: unknown

Considered a defect: yes

Cross-species summary: In females, congenital absence of the anus is often accompanied by a rectal-vaginal fistula (tube-like passage between the rectum and vagina), allowing urine and faeces to be voided through the vulvar orifice.


1985 Swartz, H.A., Vogt, D.W., Michalski, K.A., Warren, J.E., Kiesling, D. :
Chromosomal evaluation of a ewe lamb with atresia ani vaginalis American Journal of Veterinary Research 46:2145-2146, 1985. Pubmed reference: 4062021.

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  • Created by Frank Nicholas on 06 Sep 2005