Testicles

[michaelundinaeichhorn]

Sorry,
as a vet I can tell you that in most cases you can´t directly compare human genetics of the genetic defects with canine genetics, the genetic background of kryptorchism in dogs is varified. The newest theories are that the reason is a hormonal caused dysfunction of the descendus testis, that is caused by a factorcomplex. Genetic-statistic research (Wiesener, Willer) has prooved that one of the most important factors is genetic. In former times they thought it was a autosomal-recessive way, nowadays it is thought to be polygenic.
Carriers of that disease should not be used for breeding (kryptorchids themselves and females or males with an above-avarage high amount in their offspring).
Breeds with high incidence are: Minituare and Toy Poodles, German Shepherd, Welsh-Corgi, Smooth-haired Foxterriers, Greyhound, Whippet, Pomeranian, Maltese, Boxer.

In breeds where kryptorchids have been used for breeding (Boxer) the incidence increased clearly, so even if not every case may be genetic you shouldn´t take the risk.

Regards Ina