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Only one testicle descended.

Species: Dog
Breed: boxer
Age: 6-12 months
I have a 7 month old male boxer who has only had one of his testicles drop. Can you tell me the health concerns related with this condition? Is there a possibility that his testicle could still descend? Is there any way to assist the testicle to descend? Also, would he be able to breed, and would there be risk of this condition being passed on to his puppies? Is he at an increased risk of developing cancer if he is not neutered now?


Online vet, Dr. Marie

Dr. Marie replied:

This is an excellent question!

By 7 months of age, if only one testicle has descended then it is very unlikely that the other one will. It is still possible, but in my experience if the second one does not drop by 5 months then it usually doesn't come down at all.

There is no way to assist the testicle to drop.

You definitely want to have him neutered. There are a few reasons for this. First, the testicle that hasn't dropped is likely sitting in his abdomen. This causes it to be at a higher temperature than the testicle that is outside of the body in the scrotum. This increase in temperature can cause several things:
  • An increase in testosterone production - this can lead to increased aggression, urinating on things, mounting things.

  • Cancer - A testicle that is inside the abdomen has a very high chance of becoming cancerous later on in life.

  • Prostate problems - Many prostate problems are brought on by high levels of testosterone.


Now for your next question...Would he be able to breed? Well yes, he can breed but he should not be bred. The reason for this is that cryptorchidism (not having two descended testicles) is a genetic condition. This means that any male pups he fathers are likely to have the same problem.

I hope this answers your question. Please have him neutered soon!

Dr. Marie.

---This question was asked in our Ask A Vet For Free section.---



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Disclaimer: Although Dr. Marie is a qualified veterinarian, the information found on this site is not meant to replace the advice of your own veterinarian. AskAVetQuestion.com and Dr. Marie do not accept any responsibility for any loss, damage, injury, death, or disease which may arise from reliance on information contained on this site. Do not use information found on this site for diagnosing or treating your pet. Anything you read here is for information only.

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Dr. MarieDr. Marie is a veterinarian who practices in a busy animal hospital in Ottawa, Ontario. She created Ask A Vet Question as a resource for good, accurate veterinary advice online. Dr. Marie treats dogs, cats, hamsters, guinea pigs, and rats. She has been a vet since 1999.

Is an online vet visit just as good as a trip to your veterinarian? No! But, many times, asking an online veterinarian a question can help save you money. While Dr. Marie can't officially diagnose your pet or prescribe medications, she can often advise you on whether a vet visit is necessary. You can also ask Dr. Marie for a second opinion on your pet's condition.