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When do testicles descend? What problems are associated with retained testicles?

Normally testicles descend between eight weeks and three months. However, in our breed, dogs have had testicles descend as late as 1 year. If the dog...

To read more click on each link

When do testicles descend? What problems are associated with retained testicles?

Normally testicles descend between eight weeks and three months. However, in our breed, dogs have had testicles descend as late as 1 year. If the dog doesn’t have both testicles descended by a year, the testicles will not descend and will be retained. If the dog has a retained testicle, it must be surgically removed, as it is dangerous for the dog to retain the testicle. Because of the surgery, the cost for neutering is higher than normal.
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Cryptorchidism (Retained Testicles)
Cryptorchidism is a condition in which a male’s testicles have not descended (dropped) into the scrotum. Some cryptorchid animals are sterile and some are not.
Descent of Cryptorchid Testicles
Cryptorchidism is diagnosed when one or both testicles are not in the scrotum but are still either in the horse’s abdomen or in the inguinal or flank area.
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Descent of Cryptorchid Testicles


A condition that is not uncommon in stud colts is called cryptorchidism. Cryptorchidism is diagnosed when one or both testicles are not in the scrotum but are still either in the horse’s abdomen or in the inguinal or flank area. Normally the testicles descend into the scrotum during the last month of pregnancy before birth or within 10 days after birth. Cryptorchidism is thought by many to be a heritable condition and therefore it is recommended to castrate all cryptorchid colts. If the testicles are retained in the abdomen, there is no alternative other than surgical removal of the testicle. This surgery is more involved than regular castration as the abdomen must be entered and it is therefore more expensive.

However, if the testicle is in the inguinal or flank area, some veterinarians feel that injection with the hormone HCG could cause the testicle to descend into the scrotum. If this treatment would cause the testicle to descend, it would either be less expensive to castrate the colt, or the colt could be left intact. Again, being left intact is not recommended because of the possible hereditary nature of the condition and breeding is not a good idea. To determine if HCG is effective, a study was performed at the University of Illinois on eight colts with retained inguinal testicles that were 6 to 8 months old. All colts were given injections of HCG twice weekly for 4 weeks. The results indicated that the injections increased testosterone levels in all colts. Also, four of the eight colts had both testicles in the scrotum after the last injection for a 50% response. So if you have a cryptorchid colt, injections of HCG might be worth a try.
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