THERIOGENOLOGY & GENETICS

Mare and Foal Survive Rare Uterine Torsion

By Aimee Levitt, July 2024

As Lynnette, a 7-year-old Percheron mare weighing approximately 2,000 lbs, moved into the final weeks of her second pregnancy in March 2023, her owner, Bonnie Marr, MD, noticed that she seemed unusually uncomfortable.

Does Inbreeding Increase Pregnancy Losses?

April 2024

Breeding choices are critical for Thoroughbreds, according to a recent study that found inbreeding may predispose the mare to mid- and late-term pregnancy losses.

Genetics Driving Speed in Racehorses

By Duncan Sandes, University of Exeter, August 2023

Improvements in genetics appear to be a factor for increasing speeds among Britain’s Thoroughbreds, which contradicts earlier studies. However, the new research also showed the rates of genetic progress are relatively low, particularly over long-distance races.

A New Way to ‘Re-Cycle’ Your Mare

By Paul Basilio, December 2023

When a mare loses a fetus, it can take months to get her back into cycle, thanks to the enduring nature of endometrial cups.

Vitrifying Larger Embryos Without Puncturing

By Marie Rosenthal MS, November 2023

Embryos that are between 300 µm and 480 µm may be vitrified without puncturing or aspirating them, and still achieve a fairly high pregnancy rate, according to Sandra Wilsher, PhD, who discussed the new technique at the British Equine Veterinary Association Annual Congress, recently held in Liverpool, England.

Genetic Cause of Night Blindness Confirmed in Tennessee Walking Horses

By Liza Crissiuma Gershony, October 2023

New collaborative research led by Rebecca Bellone, PhD, director of the UC Davis Veterinary Genetics Laboratory (VGL) provided further evidence that the CSNB2 allele causes congenital stationary night blindness (CSNB) in the Tennessee Walking Horse.