Cooled & Frozen Semen


Sexed Equine Semen Available Commercially in 2010

November 12, 2009

The ability to have stallion semen sorted for sex-selected foals is being offered on a commercial basis through a new alliance between Sexing Technologies and Equine Reproduction Innovations. The use of sex-selected semen in conjunction with... Read More


Equine Semen Extenders: Effect on Bacterial Growth and Sperm Viability

October 20, 2009

Preliminary results of a collaborative effort between researchers at Oklahoma State University and Texas A&M University were recently presented at the American Association of Veterinary Laboratory Diagnosticians in San Diego, Calif. These... Read More


Stallion Hygiene Key for Improving Frozen Semen

August 22, 2009

The semen of some stallions tolerates freezing well, while the semen of others does not. Researchers are trying to discover the reasons for this in order to develop freezing protocols that decrease the variability of sperm, thereby increasing th... Read More


Processing Dilute Semen for Artificial Insemination

April 20, 2009

Since artificial insemination is currently practiced in most equine breeds (except Thoroughbreds), processing semen for cooling and transport is a common task in most equine reproductive centers. However, processing a dilute ejaculate--one with... Read More


Summit Speakers Discuss Equine Reproductive Technology

June 05, 2008

Four speakers discussed advances in assisted reproduction to wrap up the session on the emerging science of horse breeding at the Kentucky International Equine Summit, held in Lexington, Ky., April 28-29. The speakers agreed that the key is not... Read More


Genetic Concentration: Too Much of a Good Thing?

May 24, 2008

"For years we've taught the industry about reproduction, but we haven't taught about breeding," said Gary Carpenter, executive director of the American Quarter Horse Foundation during a roundtable at the International Equine Summit, held in... Read More


Artificial Insemination: It's Not How Much You Have, It's Where You Put It

May 03, 2008

When it comes to artificial insemination in horses, the site of deposition might have a big impact on the procedure's outcome. Placing semen directly into the uterine horn containing the ready follicle could allow breeders to use far less... Read More


Ice Formation Not to Blame for Loss of Viability in Preserved Equine Sperm

September 27, 2007

Loss of spermatozoa viability following cryopreservation, historically attributed to the formation of intracellular ice, is now believed to be a result of an osmotic imbalance during thawing. Osmotic imbalances result in the movement... Read More


Reducing Breeding-Induced Endometritis by Simplifying Management?

February 01, 2007

Modern breeding management and assisted reproduction might actually exacerbate the issue of mating-induced endometritis, according to Mats Troedsson, DVM, PhD, Dipl. ACT, a professor of equine theriogenology in the Department of Large Animal Clinical... Read More


Shipping and Disease: EVA

September 01, 2006

One of the major problems with EVA is how easily it can be transferred from one horse to another. Of course there is the respiratory route, where nasal secretions spread the virus from horse to horse through a barn or training stable.... Read More


Frozen vs. Cooled Semen

January 01, 2006

We are getting ready to breed our mare to a stallion whose semen is only shipped frozen. Does using frozen-thawed semen instead of cooled semen reduce the chances of our mare getting pregnant? Read More


Breeding Globally--AI Advances

December 01, 2005

Breeding without boundaries; it sounds like science fiction. Yet today we can breed two animals from different time zones, even different continents, through advances in artificial insemination. In this article, we will delv... Read More


International Breeding

July 01, 2005

I brought two Walking Horse mares to France. I would like to breed to a U.S. stallion and want to know what the success rate might be with shipped frozen or cooled semen. Will I run into importation red... Read More


Sperm Membrane Integrity (AAEP 2004)

February 14, 2005

While a large part of microscopic semen evaluation centers around motility (directional sperm movement) and morphology (sperm structure), some reproductive specialists think there's more to the story. In an attempt to better understand stallion... Read More


Advances in Artificial Insemination

December 15, 2004

Artificial insemination (AI) is becoming an increasingly popular method for breeding horses, and with that comes advances in the timing methods used to inseminate mares. "Breeders have embraced the use of transported cooled semen for all the... Read More


Artificial Insemination Made Simple (AAEP 2003)

February 03, 2004

Squires said the perception in the industry is that mares must be examined four to six times per day to use frozen semen successfully. He said the reasons for frequent examination are because limited semen is made available and the desire to breed as... Read More


Evaluating Semen Quality

June 03, 2003

Stallion owners must determine if their stallions have what it takes physically to make a good breeding prospect, including good semen quality, before the start of the breeding season. In his presentation at the sixth annual Equine School at the... Read More


Shatner's Ex-Wife Sues Over Horse Semen

May 15, 2003

According to an Associated Press story, "Star Trek" star William Shatner's ex-wife has sued him for breach of contract over breeding privileges of three American saddlebred stallions.

“Marcy Lafferty Shatner claims in her civil lawsuit... Read More


Uterine Lavage Before Insemination Not Harmful to Mare Fertility

April 23, 2003

Uterine lavage can be performed immediately prior to artificial insemination in mares without adversely affecting fertility, according to a recent study completed at the University of Idaho (UI) in Moscow, Idaho. The uterine lavage process is... Read More


AI Made Easy

February 04, 2003

When frozen semen was first introduced, pregnancies were achieved by checking the mare frequently each day and breeding with a single dose of semen as close to ovulation as possible. Therefore, this was adopted as standard operating procedure, said ... Read More


Horseman's Day at the 2002 AAEP Convention

December 17, 2002

Horseman’s Day, held for the third time as part of the annual AAEP convention, was another rousing success. There weren’t as many people in attendance as there were in San Diego last year, but they were just as enthusiastic. AAEP officials said... Read More


Factors Affecting Fertility with Cooled Semen

November 26, 2002

With the use of cooled shipped semen on the rise, breeders want to maximize the effects of this new technology as best they can. However, there are a variety of factors that can affect fertility with cooled semen, said Dickson Varner, DVM, MS,... Read More


Foal Sex Selection

November 01, 2002

Sex selection of foals prior to conception is highly desirable for horse breeders. Currently, sperm can be sorted by their X and Y chromosomes, improving odds of sex selection through artificial insemination. Flow cytometry measures DNA in cells... Read More


Effects of Airport Radiation on Shipped Semen

October 25, 2002

As airports across the country and around the world continue to tighten security, there is a growing concern among some researchers that increased irradiation levels for screening luggage and shipped parcels have the potential for damaging... Read More


Finding a Suitable Cooled Semen Facility

October 01, 2002

Q: I'm considering using shipped cooled semen for my mare. I want to find a reliable farm/facility to take the shipment and breed her. How do I find a qualified facility? What questions do I need to ask about quality? ... Read More