Persistent Müllerian Duct Syndrome (PMDS)

Persistent Müllerian Duct Syndrome (PMDS)is a hereditary disease which can be tested with a DNA test.  Persistent Müllerian Duct Syndrome (PMDS) is a sex-limited autosomal recessive disorder, characterized by the presence of Müllerian duct derivatives in otherwise phenotypical normal male dogs. PMDS male dogs have a normal male karyotype (78, XY) but develop a complete bicornuate uterus, bilateral oviducts, uterine body, a cervix, and the cranial portion of the vagina (upper vagina). Approximately 50% of affected dogs are unilaterally or bilaterally cryptorchid. 

DNA testing for the mutation prior to breeding is recommended, because affected dogs with scrotal testes are fertile but they transmit mutation to their offspring’s.

Inheritance: autosomal recessive

Mutation:  AMHR2  gene

Genetic test: The method used for genetic testing is extremely accurate and allows complete differentiation between affected animals, carriers and healthy dogs. DNA testing can be done at any age.