Help Needed for Stallion Infertility Research

Bhanu P. Chowdhary, BVSc, AH, MVSc, PhD, associate professor in Texas A&M's College of Veterinary Medicine, is trying to find molecular causes of stallion infertility and reduced fertility.

Chowdhary said, "Our research focuses specifically on genes located on the Y chromosome of the horse. In humans it has been clearly shown that of the around 7% infertile males, at least a quarter are due to 'problems' on the Y chromosome. These could be in the form of deletion, rearrangements, or mutations in genes on the Y chromosome.

"We intend to identify similar problems in horses. The outcome will help us understand the genetic causes of stallion infertility."

What does the laboratory need? Around 30-50 mL blood from:

  • Stallions with fertility problems (completely infertile stallions to those with significantly reduced fertility).
  • Intersex horses (having both male and female characteristics); hermaphrodites (having male and female organs and gametes); or horses with gonadal dysgenesis (absence of an X chromosome in females);
  • Horses with unusual genitalia.

Chowdhary will extract DNA and test genetic markers. All shipping expenses and other charges (up to $35/horse) are covered, and tubes/material for blood collection are provided. For more information, contact Chowdhary at

About the Author

Stephanie L. Church, Editor-in-Chief

Stephanie L. Church, Editor-in-Chief, received a B.A. in Journalism and Equestrian Studies from Averett College in Danville, Virginia. A Pony Club and 4-H graduate, her background is in eventing, and she is schooling her recently retired Thoroughbred racehorse, Happy, toward a career in that discipline. She also enjoys traveling, photography, cycling, and cooking in her free time.

Stay on top of the most recent Horse Health news with FREE weekly newsletters from Learn More