Cryptorchidism - The Horse Forum
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post #1 of 16 Old 06-26-2012, 10:32 AM Thread Starter
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Cryptorchidism

I noticed in another thread that several people mentioned a that a cryptochid horse was a risk for causing pregnancy in a mare.

A retained testicle cannot produce sperm. If a cryptorchid horse produces sperm, it will be because he has one descended testicle. Sperm can only develop at temperatures that are lower than core body temperature. The retained testicle can and will produce testosterone, so the horse will act like a stallion. Retained testicles tend to develop malignant tumors and should be removed. The biggest problem in castrating these animals is the expense and risk of doing abdominal surgery to remove the retained testicle.

The tendency to retain a testicle is hereditary; therefore, it is unwise to breed these horses.

Merck Veterinary Manual

A "proud cut" horse refers to a gelding that was improperly castrated so that part of a testicle was left in the horse.
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post #2 of 16 Old 06-26-2012, 10:38 AM
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I have tried to explain it over and over also. A retained testicle will not produce viable sperm.. Not possible.
Someone even mentioned a famous stallion that was a Chryp and produced foals. I explained that it was probably APIndy who was indeed a chryp, but also had a normal testicle........
I think the stories about "my grandpa had one that had produced babies" will always prevail.
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post #3 of 16 Old 06-26-2012, 12:50 PM
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Just a correction...

It is unusual, but not uncommon for testes undescended due to inguinal retention to produce viable sperm. As inguinal retention is classified as one type of cryptorchidism, a blanket statement that a cryptorchid cannot produce viable sperm is not correct...
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post #4 of 16 Old 06-26-2012, 01:42 PM
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If the testicle is up inside the body an not in the scrotum, the sperm can't live. Same with humans/dogs/other animals with a scrotum. That is why if it gets hot outside, the sack tends to let the testicles hang lower, if cold, the sack sucks the testicles closer to the body.

But obviously, you must have more knowledge than thousands of vets. I stand corrected.
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post #5 of 16 Old 06-26-2012, 02:12 PM
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If you are referring to the comment that I made, I was referring to the testicle that had dropped. The person's vet told them that a crypt was not able to create viable sperm and was 95% certain that he was infertile. That is incorrect. The testicle that dropped would have created new, viable sperm, and would be effective at impregnating mares.

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post #6 of 16 Old 06-26-2012, 02:24 PM Thread Starter
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Grayshell, I don't think that I was referring to your comments.

Faceman, this looks like new information. Can you please site your research data?

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post #7 of 16 Old 06-26-2012, 02:32 PM Thread Starter
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To put things into perspective, here we are, mature adults, arguing about testicles.............
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post #8 of 16 Old 06-26-2012, 02:40 PM
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I didn't mean you either grayshell... Once a testicle drops, at any time, it can produce sperm, viable sperm, OUTSIDE the body... Testicles inside the body can't produce sperm that will impregnant a female.
Unless of course, there is new studies that prove this medical information wrong, heck, men/horses/dogs/ will be much more valuable if a testicle inside the BODY can produce viable sperm while INSIDE the body.
Will wonders never cease.
Faceman, I would love to see the information you have concerning this statement that a testicle, undescended above the inguinal ring, can in fact produce viable sperm while undescended above the scrotum.
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post #9 of 16 Old 06-26-2012, 03:52 PM
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Quote:
Originally Posted by wyominggrandma View Post
If the testicle is up inside the body an not in the scrotum, the sperm can't live. Same with humans/dogs/other animals with a scrotum. That is why if it gets hot outside, the sack tends to let the testicles hang lower, if cold, the sack sucks the testicles closer to the body.

But obviously, you must have more knowledge than thousands of vets. I stand corrected.
No need to be snarky because you were unable to comprehend my post.

There is more than one location of the testes in equine cryptorchids - one of which is capable of producing viable sperm. If you don't want to take my word for it that is fine by me, but you might want to research it before you get snarky and stick your foot in your mouth...

Because I'm a nice guy, I'll help you get started. I can't copy this particular article because it is copyrighted, but can provide the link. Reference the paragraph that starts with "Except as otherwise noted..."

Cryptorchidism in the horse

Oh, and by the way - I don't have more knowledge than thousands of vets...competent equine repro vets know very well an inguinal crypt can imrpegnate mares, although it is not common...
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post #10 of 16 Old 06-26-2012, 03:56 PM
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Quote:
Originally Posted by wyominggrandma View Post
Faceman, I would love to see the information you have concerning this statement that a testicle, undescended above the inguinal ring, can in fact produce viable sperm while undescended above the scrotum.
Didn't see your second post, but as I said above, read my first post. I clearly was referencing an inguinal crypt...

My post...

Quote:
It is unusual, but not uncommon for testes undescended due to inguinal retention to produce viable sperm. As inguinal retention is classified as one type of cryptorchidism, a blanket statement that a cryptorchid cannot produce viable sperm is not correct...
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