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Is Your Stud Dog Really Sterile?
Treatment Possibilities

Is your dog really sterile? Does he have a diagnosis of aspermia (no sperm)? Did the veterinarian check him for retrograde ejaculation? Were hormone studies done?

Just because your dog has no ejaculate at all, or no sperm in his ejaculate, he may not be totally and finally sterile. The first condition you should check for is retrograde ejaculation. After attempting to collect the dog that won't produce anything, take him out to urinate, and collect the urine. If there are sperm in the urine, the condition is known as retrograde ejaculation. It is often possible to treat this condition. In our clinic, we have excellent success in returning these dogs to normal fertility. The blockage that causes the retrograde ejaculation is generally associated with the prostate gland, and a result of infection. Never accept a diagnosis of permanent infertility in such a dog as final until treatment has been attempted.

If your dog produces plenty of fluid, but no sperm - aspermia - he may have a testicular tumor. Dogs rarely have the highly malignant type of tumor that Lance Armstrong had. Generally, testicular tumors in dogs are benign. Through careful palpation, ultrasonography and hormone studies, a proper diagnosis of such a tumor can be made. These benign tumors are usually in only one testicle. If this is the case, the affected testicle can be removed, and the other one will resume normal sperm production.

Canine Fertility Center - Dr. Mary C. Wakeman, D.V.M.