<P> The fertility reduction after orchiopexy for bilateral cryptorchidism is more marked , about 38 % , or 6 times that of the general population . The basis for the universal recommendation for early surgery is research showing degeneration of spermatogenic tissue and reduced spermatogonia counts after the second year of life in undescended testes . The degree to which this is prevented or improved by early orchiopexy is still uncertain . </P>
why does failure of testes to descend into the scrotum cause sterility
degeneration of spermatogenic tissue and reduced spermatogonia counts