Cryptorchidism is associated with impairment of germ cell maturation and subsequent infertility in adulthood.

Can cryptorchidism cause infertility in dogs?

If both testicles are retained, the dog may be infertile. The retained testicles continue to produce testosterone but generally fail to produce sperm. "If both testicles are retained, the dog may be infertile." One complication of cryptorchidism is spermatic cord torsion (twisting onto itself).

Can a man with one testicle make a woman pregnant?

Yes, in most cases, people with one testicle can get someone pregnant. Remember, one testicle can provide enough testosterone for you to get an erection and ejaculate. This is also enough to produce adequate sperm for fertilization.