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Featured News: Foal Photo Contest 2016

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May 22, 2013

Foal_2015_Colt_Sternlicht x Fireworks 400x Send Us Your SBS Frozen Semen Foal Photos. Pull out your cameras and start snapping! We'd like to see photos of your foals born in 2016 (2015 if born August – December in the Southern Hemisphere) from semen frozen by an SBS affiliate lab or resulting from embryo transfer performed at one of our SBS affiliate labs. The winner of the best foal photo will win a $75 Dover Saddlery gift certificate (or for for submissions from EU/AUS). Photos will be posted to our website and will be judged on composition by our SBS affiliate members. Click here to see the current submission of foals from 2015.

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Featured Blog: Can Genetics Turn the Art of Stallion Selection into a Science?

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February 03, 2016

Genetics_Horse Chromosomes The horse genome contains all the information required to direct the growth and function of a foal, from conception to death. This enormous “text” is organized into chromosomes, much like the volumes of an encyclopedia. The domesticated horse possesses 32 unique chromosomes, and most cells carry two copies of each chromosome for a total of 64. Gametes of course are the exception, carrying just one of each of the chromosome pairs to the future offspring. This article will discuss information about genotype vs. phenotype, genetic testing, recent genetic studies performed on stallions, and current genetic research being performed on the "freezability" of stallion sperm.

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Featured Question

Does breeding with 2 doses result in more post-breeding fluid accumulation and cause decreased fertility?

The numerous reports on timed-insemination protocols demonstrate that multiple inseminations in normal mares are not harmful. Insemination with frozen-thawed semen twice per cycle does not increase the incidence of fluid accumulation and post-breeding endometritis. Moreover, data from several large scale studies suggest that multiple inseminations on a cycle (fresh or frozen) result in higher pregnancy rates, presumably because of a decrease in the interval between insemination and ovulation.

All mares experience a natural inflammatory response within the uterus, after the deposition of semen. The post-breeding inflammation, initiated by the first insemination is cleared within 12 hours in reproductively healthy mares. Thus, a second insemination can safely be performed within 24 hours, without negatively affecting fertility. Some problem mares appear less efficient at clearing the uterine lumen of semen and inflammatory products accumulated after breeding. Fertility is reduced in this group of mares and, unless properly addressed, the condition may aggravate with subsequent matings. Mares unable to overcome the inflammatory process that follows mating should be bred once per cycle, as multiple inseminations (fresh or frozen) may result in post-breeding fluid accumulation and decreased pregnancy rates.

See also:

Effect of Number and Timing of Equine Frozen Semen Inseminations on Fertility

The Pros and Cons of 1 or 2 Dose Insemination Protocols

Factors Affecting the Uterine Inflammatory Response to Semen

The Facts About Frozen Semen and Post-Breeding Uterine Fluid

Biofilms in Mares

Breeding for success? Follow the experts!

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