Maximizing Cooled and Frozen Semen’s Fertility

Learn about the steps vets and stallion managers can take to help improve the quality of cooled and frozen semen.
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The use of cooled and frozen semen has, quite literally, given breeders a world of stallions to choose from when selecting a mate for their mares. These products also allow veterinarians to inseminate mares at the ideal time in her estrous cycle, regardless of whether the stud resides around the corner or across the ocean.

But there are still kinks in the system, and mare owners are sometimes disappointed when the semen fails to result in a pregnancy. Fortunately, there are steps veterinarians and stallion managers can take to help improve the quality of cooled and frozen semen.

At the 2015 World Equine Veterinary Association Congress, held Oct. 8-10 in Guadalajara, Mexico, Ed Squires, MS, PhD, Dipl. ACT (Hon), reviewed some of those methods. Squires is a professor at the University of Kentucky’s Gluck Equine Research Center, in Lexington.

Cooled Semen

“Even under ideal conditions, not all stallions have sperm that will survive cooling and storage,” Squires explained. “However, there are some common mistakes made in processing and shipping cooled semen that can adversely affect fertility

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Erica Larson, former news editor for The Horse, holds a degree in journalism with an external specialty in equine science from Michigan State University in East Lansing. A Massachusetts native, she grew up in the saddle and has dabbled in a variety of disciplines including foxhunting, saddle seat, and mounted games. Currently, Erica competes in eventing with her OTTB, Dorado.

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