These resources are brought to you by the Cooperative Extension System and your Local Institution

Horses Home

If my mare had her ovaries removed, why does she still display all the signs of a mare in heat?

Last Updated: July 20, 2006

View as web page


Estrous behavior is possible in healthy ovariectomized mares. This behavior can occur in mares that were ovariectomized either before or after they reached puberty, which indicates they are demonstrating estrus due to something other than learned behavior.

Research done in the late 1980s indicated that the adrenal glands of the mares are probably producing the hormones that are causing your mares to show estrus, even though they have been ovariectomized.

Browse related Faqs by tag: horses


Have a specific question? Try asking one of our Experts

Unlike most other resources on the web, we have experts from Universities around the country ready to answer your questions.


View this page: