The Endocrinology Laboratory is pleased to announce the addition of a premium equine cryptorchid panel, which includes the equine anti-Müllerian hormone (AMH) test and the testosterone baseline test.

The new test code is CRYPEQ.

The laboratory currently provides an equine cryptorchid panel that includes testing for estrone sulfate (E1SO4) and testosterone. That panel will be retired Jan 1, 2025.

For equine and mixed animal veterinarians

The AMH test assesses cryptorchidism and retained testicular tissue in male horses. The test is not available for donkeys.

Young animals with unilaterally descended testicles are routinely interrogated to determine if the animal has a retained testicle or if it had been previously removed.

AMH is present in males at birth, so the test excels at evaluating these patients, particularly since tests for estrone sulfate and testosterone do not perform well in young animals.

Equine behavior and situation considerations

In cases of mounting, biting and aggression, AMH tests help evaluate whether there is a testicular remnant responsible for the behavior. Smaller testicular remnants, especially in the older horse, will produce reduced levels of testosterone due to the prolonged exposure to warmer body temperatures. AMH is generally less affected and can perform better in these cases.

Horses sold through auctions or public sales may be tested to determine reproductive status. A variety of factors (age and size of the remnant) affect testosterone, so AMH is a useful supplement to testosterone testing.

Timeline

Estrone sulfate will remain available for pregnancy diagnosis in female horses, but will not be available for male horses after Jan. 1, 2025.

If you have any questions regarding the new panel, please call 607-253-3673.