Monorchidism in dogs, also known as cryptorchidism, is a condition in which only one testicle descends and the other testicle is unable to descend into the scrotum. Finally, the testicle reaches the scrotum from within the inguinal canal.Click to see full answer. Also to know is, what is a cryptorchid dog?Cryptorchidism is the medical term that refers to the failure of one or both testicles (testes) to descend into the scrotum.One may also ask, how do you know if your dog has cryptorchidism? Symptoms Of Cryptorchidism In Dogs The main sign of this condition is that one or both testicles haven’t descended by around the age of four months. If an un-descended testicle is retained in the inguinal canal, a veterinarian will likely be able to feel it by using abdominal palpitations. Thereof, is cryptorchidism in dogs dangerous? Because cryptorchidism carries significant health risks. Most seriously, dogs with cryptorchidism can develop torsion, an extremely painful condition where the testicle twists upon itself, inhibiting blood flow.Can a dog breed with 1 testicle?When one testicle does descend into the scrotum the pet will be fertile. When two missing testicle are under the skin near the scrotum, the pet may be fertile. But it is a very bad idea to breed dogs and cats that are cryptorchid because their descendants will carry the same defective genes.