Male Pseudohermaphroditism of the Testicular Feminizing Type in a Horse

Abstract
Features characteristic of the hereditary syndrome of testicular feminization (tfm) were observed in a 7-year-old Quarter Horse. The horse had female body habitus and male psychosexual behaviour. Gonads located in the abdomen were testes and the uterus and cervix were absent. The vagina was normal in depth but ended as a blind pocket. The sex chromosome composition of testicular fibroblast and leucocyte cultures was XY. Construction of a family pedigree revealed a pattern of hereditary transmission similar to that reported for tfm in other mammalian species.

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