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Skip Navigation LinksAll Horse Topics > Breeding/Reproduction > General Reproduction Topics


Articles ( * = TheHorse.com members only )Date Posted
Breedings to Deceased Stallions Offered Via Injection Technique
A reproductive technique called intracytoplasmic sperm injection (ICSI), in which a sperm cell is injected directly into an egg, has resulted in foals from many mares that were no longer able to produce. However, it might be equally as important in reviving valuable genetics from stallions that have been dead for decades. The ability to freeze ... Read full story
 11/17/2009
Sexed Equine Semen Available Commercially in 2010
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 intracytoplasmic sperm injection will be offered to horse breeders for the 2010 breeding season. Why used ... Read full story
 11/12/2009
Late Term Abortion in Mares Reviewed for World Equine Veterinarians
Failure to conceive and early embryonic death both negatively impact the equine breeding industry; however, late-term abortions also occur and should not be ignored, said Michelle M. LeBlanc, DMV, Dipl. ACT, from Rood & Riddle Equine Hospital in Lexington, Ky., during the 11th Congress of the World Equine Veterinary Association, which was held ... Read full story
 11/7/2009
Equine Reproduction Course Offered for Ontario Horse Owners
A two-day equine Reproduction course, designed for anyone interested in learning about artificial insemination (AI) techniques for horses, will be offered Nov. 7-8, 2009, in Clinton, Ontario, at the Regional Equine & Agricultural Centre of Huron (REACH). “Now is the time owners should be thinking about getting their mares ready for next ... Read full story
 11/1/2009
Genetic Diseases in Horses Reviewed for World Equine Vets
While genetic diseases exist in a number of horse breeds, many researchers have focused expressly on issues occurring in the Quarter Horse breed. Thanks to their efforts, genetic tests for several disorders specific to this breed are now commercially available for breeders and horse owners. "The size of the Quarter Horse industry, the commitment ... Read full story
 10/31/2009
UK Breaks Ground on Equine Reproduction Facility
A groundbreaking ceremony for University of Kentucky Equine Reproduction Facilities was held Oct. 26 at UK's Maine Chance Equine Campus. The ceremony recognized supporters who generously donated money to fund the remodeling of facilities for equine reproduction research by experts at the Maxwell H. Gluck Equine Research Center. The remodeled ... Read full story
 10/30/2009
Jockey Club Releases Thoroughbred Breeding Stats   *
The "Report of Mares Bred" released by The Jockey Club Oct. 22 shows that Pennsylvania breeding is on the rise while the industry is in decline in every other major breeding state. According to the report, based on information received through Oct. 13 and which TJC said represents approximately 92% of the mares bred this year, the number of mares ... Read full story
 10/22/2009
Mares' Social Bonds Might Enhance Reproductive Success   *
Mares that form close social bonds with other mares have improved pregnancy, foal birth, and foal survival rates, said a group of researchers studying wild herds in the North Island of New Zealand. The mares' enhanced reproductive success appears to be linked primarily to mutual protection from harassment by stallions, they said. Unlike most other ... Read full story
 10/7/2009
Monitoring Fetal Growth via Ultrasonography  *
Ultrasonography is a valuable tool for detecting pregnancy and establishing pregnancy loss, but it can also be used to evaluate equine fetal growth, said W.K. (Karin) Hendriks, DVM, Dipl. ECAR. Veterinarians could use a combination of transrectal and transabdominal ultrasounds to provide good information about fetal development. Because it is difficult ... Read full story
 10/4/2009
CEM Investigation Appears to be Wrapping Up  *
Barring any big surprises, the investigation into contagious equine metritis (CEM) in the United States might be winding down, with testing and treatment completed for 91.2% of the 715 exposed mares and 77.7% of the 274 exposed stallions as of Sept. 24. In total there were five positive mares and 22 positive stallions identified during the course ... Read full story
 9/24/2009
U.S. Thoroughbred Foal Crop Down 8.2%   *
The Jockey Club today reported that 3,439 stallions covered 56,901 mares in North America during 2008, according to statistics compiled through Sept. 9, 2009. These matings have resulted in 31,727 live foals of 2009 being reported to The Jockey Club on Live Foal Reports received as of Sept. 9, 2009. As in past years, The Jockey Club estimates that ... Read full story
 9/17/2009
Equine Reproduction Advances: Filly Born a Year after Dam's Death  *
Mira, a foal born Aug. 4, runs happily in Binghamton, N.Y., even though her mother died almost a year ago from a ruptured intestine. Her birth was made possible through a team at Cornell that might be among the first to successfully extract and ship eggs from a dead mare for remote fertilization and implantation. After the mare died at the Cornell ... Read full story
 8/14/2009
Endometritis in the Mare  *
Endometritis, an inflammation of the interior lining of the uterus, continues to be a major cause of subfertility or infertility in the mare. There are many diagnostic tools that have been developed to determine if a mare has endometritis. These include ultrasonography, examination of the cervix with a speculum, examining vaginal discharge, uterine ... Read full story
 8/7/2009
Equine Study Shows Genetic Abnormalities Cause Infertility  *
There is more to horse infertility than meets the eye. Advances in cytogenetic analyses using high-tech DNA-based assays have enabled researchers to look at reproductive disorders from a genetic standpoint. After applying the tests to horses with known reproductive issues, a high frequency of sex chromosome abnormalities was identified in horses that ... Read full story
 8/7/2009
Pacer Arizona Helen Reclassified as "Horse"  *
Arizona Helen, a Standardbred pacer with two Harrah's Chester victories to her credit, in December 2008 walked into the Hogan Equine Clinic in Cream Ridge, N.J., a she, and left as a he. The horse tested positive for testosterone after a win in November 2008. Knowing he didn't administer hormones to the 5-year-old mare, Arizona Helen's former trainer, ... Read full story
 8/6/2009
Equine Vet Brinsko Named Theriogenology Vice President  *
Steven Brinsko, DVM, PhD, Dipl. ACT, associate professor and chief of Theriogenology in the Department of Large Animal Clinical Sciences at the Texas A&M College of Veterinary Medicine & Biomedical Sciences, has been named the 2009 vice president of the American College of Theriogenologists (ACT). Brinsko will begin his four-year term as ... Read full story
 7/30/2009
Uterine Inflammation, AAEP 2008   *
The mare's reproductive tract is similar to the respiratory tract in that both have mucosal immune systems. In both areas, the mucosal immune system is capable of producing excessive quantities of mucus when persistently irritated. Robert C. Causey, DVM, PhD, an associate professor in Animal and Veterinary Sciences at the University of Maine, discussed ... Read full story
 6/26/2009
Equine Online CE Courses Available from OSU  *
The Ohio State University's online continuing education (CE) Web site became available last February, bringing versatility to CE in the fast-paced veterinary profession. All courses are about an hour to 90 minutes in length and range in cost from $40 to $60. Three new equine courses are now available via Online CE. Walter Threlfall, DVM, MS, PhD, ... Read full story
 6/10/2009
New Horse Owners Learn About Breeding Process  *
If there's one thing the horse industry needs, its new blood to fuel the sport. The Thoroughbred Owners and Breeders' Association (TOBA) works each year to accomplish just that through its new owner seminars and breeding clinics, the most recent of which took place at Robert N. Clay's Three Chimneys Farm near Midway, Ky., May 29. The three-day clinic ... Read full story
 5/31/2009
ELISA Blood Test for Equine Pregnancy Tracking Available   *
Horsemen have a new option when checking mares for pregnancy this breeding season. Biotracking, a company created by Garth Sasser, PhD, a professor of animal science at the University of Idaho, came up with a blood test for ruminants (BioPRYN) a few years ago. Now BioPRYNes, an enzyme-linked immunosorbent assay (ELISA) test that detects estrone sulfate ... Read full story
 5/7/2009
Vanderwall to Head UPenn Reproduction Center   *
University of Pennsylvania Veterinary Medicine has announced the appointment of Dirk Vanderwall, DVM, PhD, Dipl. ACT, to chief of the reproduction section and director of the Hofmann Research Center for Animal Reproduction at New Bolton Center. As the chief of reproduction and director of the Hofmann Center for Animal Reproduction, Vanderwall will ... Read full story
 4/13/2009
Breeding Season Stress Can Lead to Gastric Ulcers   *
Breeding season can be a stressful time for owners and horses alike. While horse owners are hustling to prepare facilities, the broodmares might be just as tense. Especially for young and maiden mares, the stress from being trailered to new facilities and being separated from herd mates might lead to stomach ulcers. "Young mares and maiden mares ... Read full story
 3/5/2009
AAEP 2008: Estimating Future Stallion Fertility   *
When a racing or performance stallion is retired to stud, many owners choose to purchase first-season subfertility insurance, also called congenital infertility insurance, against the possibility that he might be infertile. Veterinary examination of the prospective breeding stallion is required and, generally based solely on the size of his testes, ... Read full story
 3/2/2009
Curlin Begins New Career as Stallion  *
Curlin, North America's richest horse with earnings of more than $10.5 million, began his new career Feb. 13 when he covered his first mare at Will S. Farish's Lane's End Farm near Versailles, Ky. According to a release from Lane's End, the first mare bred to the two-time Horse of the Year was Maggy Hawk, a mare owned by Jess Jackson, the majority ... Read full story
 2/14/2009
New Fact Sheets Available on TheHorse.com  *
TheHorse.com launched the first in a series of Fact Sheets on Jan. 13 to widespread acclaim. This week we present more Fact Sheets on topics that our readers have indicated are important to them based on searched terms, reader views on that topic, surveys/polls, and personal communications. Following are the newest Fact Sheets now available on TheHorse.com: ... Read full story
 2/2/2009
TheHorse.com Launches Editorial 'Fact Sheet' Series  *
Sometimes it is difficult to find that one short authoritative article that gives the basic information you're looking for on a specific equine topic. Something that gives you a foundation when you are looking for a starting point on which to build knowledge about a problem that has beset your horse. TheHorse.com has the answer: Fact Sheets. A series ... Read full story
 1/21/2009
Prevent CEM, Other Infectious Diseases Through Strict Hygiene  *
Strict hygiene guidelines should be followed whenever handling breeding mares or stallions to prevent reproductive infectious diseases, including contagious equine metritis (CEM). CEM is spread between horses primarily by breeding, either by natural service or artificial insemination (AI). Grooms, handlers, and breeding technicians or veterinary ... Read full story
 1/7/2009
Fourth Stallion has CEM; Kentucky Farm and State Working Together   *
A fourth stallion that formerly stood at a Central Kentucky breeding facility, now identified as DeGraff Stables/Liberty Farm Equine Reproduction Center LLC, has tested positive for contagious equine metritis (CEM). Officials had considered this highly contagious venereal disease eradicated from the United States until it was identified during routine ... Read full story
 12/23/2008
As the Sperm Turns  *
Conception in the horse seems simple--a uniting of one healthy egg and one healthy sperm--but there is much more going on in this virtual soap opera of creating a new horse. Fertilization is the beginning of a new individual: the culmination of many biological processes working in concert to form a new life. The timing and precision of it all is ... Read full story
 12/1/2008
Foal Weight Partially Dependent on Parity in New Study  *
Australian researchers based at Coolmore Stud in New South Wales, Australia, reported in a new study that placental weight and parity (number of foals a mare has had) are positively associated with foal weight. In contrast, neither gestation length nor age of mare were implicated in affecting birth weight. "It is widely perceived by the Thoroughbred ... Read full story
 11/29/2008
Standardbred Breeding Farm to Receive AAEP Welfare Award  *
Hanover Shoe Farms, the world's most prolific Standardbred breeding farm, will be honored with the American Association of Equine Practitioners' (AAEP) 2008 award for outstanding service in equine welfare, the Lavin Cup. The Lavin Cup, named for former AAEP President A. Gary Lavin, VMD, will be presented to a representative of Hanover Shoe Farms ... Read full story
 11/17/2008
Drug Protocol Turns Rescued Mares into Nurse Mares  *
A medication protocol that can induce lactation in "open" mares has changed the way prominent Kentucky Standardbred nursery, Walnut Hall Ltd., manages its nurse mare herd, while giving more than 20 rescued mares a new Walnut Hall's vet, Joe Lyman, DVM, based the technique on presentations by Peter Daels, DVM, PhD, and John Steiner DVM, Dipl. ACT. ... Read full story
 11/13/2008
Equine Endometrial Infections Following Embryo Transfer Limit Pregnancy Rates   *
According to a group of European reproduction specialists from the Centre for Artificial Insemination and Embryo Transfer, University of Veterinary Sciences in Austria, subclinical infections of the uterine lining can occur following transcervical embryo transfer (ET) in mares. However, these can be limited via the preventive administration of non-steroidal ... Read full story
 10/25/2008
Jockey Club: Thoroughbred Mares Bred Down 7.7%   *
The Jockey Club released the Report of Mares Bred (RMB) statistics Oct. 16 for 2008 that show a continued decline in North American Thoroughbred breeding activity. Based on RMBs received through Oct. 10, The Jockey Club reported 2,643 stallions covered 52,410 mares in North America during 2008. The statistics include the number of mares bred to ... Read full story
 10/19/2008
Researchers: Mare's Condition Appears to Impact Sex of Foal  *
A recent study of wild horses in New Zealand has found that broodmares that are healthiest at the time of conception are more likely to have colts. The study, conducted by researchers Elissa Cameron, MSc, PhD, and Wayne Linklater, PhD, found a striking correlation between the change in a mare's condition and the sex of her foal. In mares that were ... Read full story
 10/18/2008
Mare Instinct After Loss  *
Q: After several years of pasture breeding, we are having our first experience with a stillbirth. The dam is a 5-year-old mare with her first pregnancy. The foal was right on time, as we estimated it from the last observed breeding after which we removed the stallion. Luckily, we saw her from the start of labor, and everything happened pretty fast. ... Read full story
 9/1/2008
Filly in Training at Racetrack Gives Birth  *
Owners are seldom at a loss for words but when Marvin and Joel Cunningham were informed that their 2-year-old homebred filly Tiger Eyed had given birth they were speechless. The foaling occurred Aug. 20 on the backstretch at Harrah's Louisiana Downs racetrack near Bossier City, La. At 5 a.m., trainer Patrick Mouton pulled up to Barn 33-C in his truck ... Read full story
 8/22/2008
TheHorse.com Announces Four New Electronic Newsletters  *
TheHorse.com announces the addition of four new monthly electronic newsletters. These e-newsletters will contain articles, news, video links, tips, and links to downloadable information specific to the topics of nutrition, lameness/laminitis, preventive care, and breeding. Currently TheHorse.com publishes two weekly e-newsletters. The Horse Health ... Read full story
 7/29/2008
Special Report: Racehorse Durability  *
In this exclusive report, The Blood-Horse investigates whether the Thoroughbred racehorse is as tough today as it was 30 to 40 years ago. Editors of The Blood-Horse recently sought the answer to this question by producing a comprehensive review of 34 years of historical Thoroughbred stallion progeny records pulled from The Jockey Club's extensive database. ... Read full story
 7/24/2008
Behavioral Therapy Reduces War Emblem's Breeding Foibles   *
Moved to a tranquil area away from other stallions and shielded from most visitors, temperamental champion and dual classic winner War Emblem now spends his days in a quiet grassy paddock over looking fields containing grazing mares and foals. In this peaceful area of the Shadai Stallion Station in Japan, the nearly black stallion has relaxed and ... Read full story
 7/14/2008
A Better Way?   *
Breeders willing to risk disease or injury for the traits they desire are at the heart of the problems we face today. We've had bad news following bad news lately with the loss of some of the top horses in equestrian sports. The only silver lining to emerge in this dark storm of fatal injuries in Thoroughbred racing and eventing is that these incidents ... Read full story
 7/1/2008
Castration Technique Could Reduce Complications  *
A new sterilization technique that leaves a stallion's testicles in place but nonfunctioning might provide a safe, simple, and reliable alternative to traditional castration methods, according to Iranian researchers. In the "Section-Ligation-Release" (SLR) procedure, a horse's testicles are not extracted as in standard castration techniques. Instead, ... Read full story
 6/30/2008
CEM Rule Amended for Entertainment Horses  *
The USDA has amended its import rules to allow noncompetitive entertainment horses to be temporarily brought into the U.S. from countries affected with contagious equine metritis (CEM), a venereal disease of horses. The final rule, titled "Temporary Importation of Horses: Noncompetitive Entertainment Horses From Countries Affected with Contagious Equine ... Read full story
 6/25/2008
War Emblem Breeding Mares after Therapy  *
Champion and Kentucky Derby winner War Emblem is responding well to therapy for a breeding behavior dysfunction, according to experts at the University of Pennsylvania. "He has had fertile sperm, but for several years has remained selective about which mares he would cover," said Sue McDonnell, PhD, Certified AAB, a specialist in stallion behavior ... Read full story
 6/8/2008
Summit Speakers Discuss Equine Reproductive Technology  *
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 finding new technologies for breeding, but honing in on those we currently employ with a greater understanding ... Read full story
 6/5/2008
New Horse Course on Targeting Foal Disease Available  *
Neonate losses are a significant problem for the equine industry. In one study in an equine-dense area, 68% of foal deaths occurred within the first month of life, with 41% occurring during the first week of life alone. Causes ranged from infections and musculoskeletal injuries to pneumonia and gastrointestinal disorders. In the latest Horse Course ... Read full story
 5/29/2008
Equine Reproductive Specialist Dr. John Steiner Dead  *
John Steiner, DVM, Dipl. ACT, passed away Monday, May 26, at the Albany Medical Center. He had sustained severe head injuries in an accident the previous Tuesday, and his condition worsened despite the most aggressive medical care and the prayers, love and support of so many in the equine and veterinary community. Dr. Steiner was originally from ... Read full story
 5/28/2008
Perinatology: End of Pregnancy Through Beginning of Life   *
Traditionally, one of the stronger parts of each AAEP convention program is the time devoted to reproduction. The convention held in Orlando was no exception. It began with an in-depth session titled "Perinatology--End of Pregnancy Through Beginning of Life," during which experts in the field presented hour-long lectures on various reproductive problems, ... Read full story
 5/25/2008
Genetic Concentration: Too Much of a Good Thing?  *
"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 Lexington, Ky., April 28-29. Fellow horsemen Dan Kenny, owner of Dan Kenny Bloodstock in Lexington, Ky., and ... Read full story
 5/24/2008
First Foal Sired by Cloned Stallion Born  *
The first foal sired by a cloned stallion is now nearly a month old. The filly, named Pierazade du Vialaret, is the first get of stallion Pieraz-Cryozootech-Stallion, a clone of two-time World Champion endurance horse Pieraz. The original Pieraz is an Arabian gelding. He was cloned so that his exact genes could be perpetuated. Pieraz-Cryozootech-Stallion ... Read full story
 5/22/2008
Got Milk? Central Kentucky Colostrum Bank in Need  *
Veterinarians with Rood and Riddle Equine Hospital in Lexington, Ky., have put out a call for colostrum donations as their supply has dwindled in the midst of foaling season. Colostrum is a sticky, high-protein milk secreted during the first 24 hours following birth and is characterized by a high content of antibodies. These antibodies are a foal's ... Read full story
 5/21/2008
Top Stallion Storm Cat Retires from Breeding at 25   *
Storm Cat, North America's premier Thoroughbred sire for years, has been pensioned from stallion duty because of declining fertility at the Young family's Overbrook Farm near Lexington. According to farm official Ric Waldman, the 25-year-old son of Storm Bird impregnated just three of the 32 mares bred to him this year. His fee this year was $300,000, ... Read full story
 5/14/2008
MRLS: Caterpillar Population Up Sharply from 2007  *
Experts with the University of Kentucky (UK) report that Eastern tent caterpillars are now wandering in the area, and population levels are among the highest they've seen since the 2001, when mare reproductive loss syndrome (MRLS) hit Central Kentucky particularly hard. "The Eastern tent caterpillar populations are dramatically up this year--the ... Read full story
 5/9/2008
What's Going on in There? Diagnostics for the Chronically Infertile Mare
When examining the chronically infertile mare, it's important to remember that the uterus is not an organ suspended in space--it must be viewed as one part in a complex system. Anything affecting the animal, no matter how remote, can have an effect on the reproductive system, according to Michelle LeBlanc, DVM, Dipl. ACT, a practitioner with Rood & ... Read full story
 5/8/2008
Artificial Insemination: It's Not How Much You Have, It's Where You Put It  *
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 ejaculate per mare, maximizing stallion fertility rates, and reducing the likelihood of endometritis, according ... Read full story
 5/3/2008
First Offspring of an Equine Clone Born in Italy  *
Prometea, the blazed Haflinger who gained notoriety in 2003 as the world's first horse clone, has given birth to a colt. Today the Laboratorio di Tecnologie della Riproduzione (LTR) in Cremona, Italy, announced the March 17 arrival of Pegaso, who was produced by a single artificial insemination attempt. Continuing the family tradition of world firsts, ... Read full story
 4/29/2008
AAEP Milne Lecture: Stallion Reproduction  *
Dickson Varner, DVM, MS, Dipl. ACT (a specialist in reproduction), is a self-described "renegade" when it comes to presenting papers at veterinary gatherings. He is known for his irreverent humor, poetry, and clever turn of phrase. That being said, Varner is also a leading researcher in equine reproduction and has helped propel Texas A&M University ... Read full story
 4/27/2008
Palm Beach Equine Medical Purchases Embryo Transfer Facility  *
Palm Beach Equine Medical Centers, headquartered in Wellington, Fla., recently purchased the New Bridge Embryo Centre in Aiken, S.C. The facility is now called the Palm Beach Equine Embryo Center (PBEEC). The goal is to continue to provide top-notch equine embryo transfers to the polo market, while expanding the services to the sport horse and performance ... Read full story
 4/25/2008
Hanging At Home with Rags to Riches  *
One year ago, Rags to Riches was a superstar on the racetrack and the favorite to win the Kentucky Oaks. Today, she is an expectant mother spending her retirement days at Ashford Stud near Versailles, Ky. Rags to Riches, owned by Michael Tabor, an associate of Coolmore Stud principal John Magnier, and trained by Todd Pletcher, was retired from racing ... Read full story
 4/24/2008
Broodmare Nutrition Horse Course Now Available  *
The second installment of TheHorse.com's Horse Course series, "Broodmare Nutrition," is now available online at TheHorse.com/HorseCourses When creating a feeding program for broodmares, it's important to remember that the mare is eating for two; you must consider the nutritional requirements of the foal, in addition to those of the mare. In TheHorse.com's ... Read full story
 4/15/2008
Mare Seized in South Carolina Abuse Case Delivers Healthy Foal  *
Caretakers of the horses seized in a recent South Carolina abuse case got some good news last month, when one of the mares delivered a full-term foal. "She's just beautiful," said Kelly Graham, director of public relations for the Richland County, S.C., Humane Society for the Prevention of Cruelty to Animals. "And she's completely healthy." Born ... Read full story
 4/14/2008
Readers Respond: Breeding Barrier  *
More than 1,000 readers of TheHorse.com responded to a poll asking, "Have you ever had a veterinarian perform a Caslick's procedure on a mare?" Results were as follows: No: 49.59% (538) Yes: 43.69% (474)) What's that?: 6.73% (73) Read more about Caslick's procedures. Results of weekly polls from TheHorse.com are published ... Read full story
 4/1/2008
Market for Mare Milk Gives Rise to Equine Dairy Industry   *
Nearly a dozen velvety black Ariègeois broodmares and an approved stallion roam and graze freely across a 120-acre pasture in the French Massif Central hills. These horses are the foundation of Nathalie and Xavier Niaux's Domaine de Merens de Bibracte, an equine dairy, where up to 3,000 liters (750 gallons) of mare milk are produced for human consumption ... Read full story
 3/29/2008
Campaigns Work to Keep Endangered Draft Breeds Viable  *
Suffering dramatic drops in numbers of registered animals, several European draft horse breed societies are coming up with targeted promotional campaigns in order to keep their breeds alive. In England, the critically endangered Suffolk is an ideal horse for riders who require a sturdy mount, according to Amanda Hillier, spokesperson for the Suffolk ... Read full story
 3/28/2008
Foals', Mares' Nutritional Needs Change Over Time, Milk Study Says  *
The nutritional needs of mares and foals in the first six months following birth are becoming better understood following recent scientific and mathematical research in Portugal. New curve graphs of mares' milk generated from milking samples show the variations in levels of protein, fat, and lactose in the first 180 days of lactation. Total milk ... Read full story
 2/24/2008
Breeding Behavior: War Emblem Managers Still Trying  *
Hope continues to spring in abundance, if perhaps not eternally, at the Shadai Stallion Station in Japan that War Emblem will overcome his mysterious disdain for breeding. With the dual American classic winner notching his first Japanese group stakes winner Feb. 11 and his limited number of progeny performing well enough to place him among the leading ... Read full story
 2/17/2008
Grayson-Jockey Club Funding 24 Equine Research Projects  *
The board of directors of the Grayson-Jockey Club Research Foundation has approved a record allocation of $1,226,457 for equine research in 2008. The funds will underwrite a slate of 14 start-up projects and 10 second-year proposals. This marks the foundation's fourth consecutive year of record funding and the second consecutive year that it is providing ... Read full story
 2/15/2008
Reproductive Hormones Directly Influence Embryo Development  *
Novel research by a group of Dutch researchers has reported the first evidence that the equine conceptus (i.e., the embryo and associated membranes) might be directly responsive to the reproductive hormones progesterone and estrogen, which could therefore play a more direct role in embryonic development and pregnancy maintenance than previously imagined. ... Read full story
 1/26/2008
Causes of Foal Mortality: a One-Year Snapshot   *
Neonatal losses are a significant problem for the equine industry. Of the 1,294 fetal, neonatal, and juvenile equine cases presented to the University of Kentucky Livestock Disease Diagnostic Center from September 2004 through August 2005, 259 cases of neonatal mortality were evaluated for this study. Cases included only those that resulted from a ... Read full story
 12/31/2007
Tobiano Gene Discoveries Mean Better Tests  *
Looking to breed for spots and have certainty about it? Breeders trying to produce horses with tobiano coloring have a new tool, available through genetic research, to help them select their breeding stock. Dr. Brooks explains her research. Watch Dr. Bailey explain the genome project. Tobiano is a common spotting pattern ... Read full story
 12/1/2007
Well-Equipped Breeding  *
Tips on what you might need to equip your stallion breeding station, from microscopes to AVs The lexicon of the breeding shed has changed dramatically in the last decade or so. Words that horse owners were unfamiliar with in the past are part of the vocabulary today. They freely discuss the merits of various artificial vaginas for collecting semen, ... Read full story
 9/1/2007
Successful Breeding of Older Maiden Mares Depends on Several Factors   *
Success when breeding older maiden mares depends on the management of several factors that contribute to the retention of excessive fluid in the uterus, including insufficient lymph drainage, a uterus hanging over the pelvic brim, and a tight cervix, according to Jonathan Pycock, B. Vet. Med, PhD, DESM, MRCVS, of Equine Reproductive Services, North ... Read full story
 7/24/2007
AAEP 2006: Reproduction Forum  *
Drug compounding, the ethics of treating cryptorchids, and sexually transmitted diseases were the hot topics discussed by equine practitioners at the Reproduction Forum, led by Steven Brinsko, DVM, PhD, Dipl. ACT, associate professor of theriogenology at Texas A&M University, and Mats Troedsson, DVM, PhD, Dipl. ACT, of the University of Florida. ... Read full story
 7/12/2007
Foals of the Future: Legal Ramifications of Cloning and Other Breeding Technologies  *
Two-time Thoroughbred Horse of the Year John Henry enjoys the life of Riley at the Kentucky Horse Park, munching grass and making occasional appearances for park visitors. It's a well-deserved retirement of one of the best horses ever to set foot on a racetrack. A durable campaigner who won 39 races during an eight-year career, John Henry was retired ... Read full story
 7/1/2007
British Equine Fertility Unit to Close   *
The University of Cambridge's Equine Fertility Unit (EFU), which among other projects over the years produced Europe's first test tube foal, will close in September due to lack of funding, said facility head Twink Allen, BVSc, PhD, ScD, DESM, MRCVS. The EFU was established 37 years ago and was funded by the Thoroughbred Breeders' Association (TBA) ... Read full story
 5/16/2007
Choosing to Breed During Foal Heat  *
If a barn full of people were asked their opinion about breeding a mare during foal heat, a barn full of opinions would result. This topic has been controversial for a long time. There is debate about whether it is harmful to a mare's health, whether it negatively impacts fertility, and whether it causes an increase in fetal loss during pregnancy. ... Read full story
 3/1/2007
It Hurts So Good: Using Acupuncture in the Treatment of Reproductive Disorders  *
Acupuncture can be a valuable alternative for the treatment of reproductive disorders, according to Rhonda Rathgeber, DVM, PhD, an acupuncturist certified through the International Veterinary Acupuncture Society (IVAS). Rathgeber provided an introduction to the workings of acupuncture, as well as its applications in reproductive work at the Hagyard ... Read full story
 2/1/2007
Reproduction Education  *
The Ninth International Symposium on Equine Reproduction was held this past summer at Kerkrade, Netherlands, and it maintained its sound reputation for presenting original and applicable research. From its origin at Cambridge in 1974 until now, this meeting has been a model of consistent quality and a platform for the best minds in the world of equine ... Read full story
 12/1/2006
Basics of Life  *
Reproduction in all species borders on the miraculous. How else can one describe a process where two infinitesimal entities, one from the male, the other from the female, join forces to produce living, breathing offspring? Reproductive capability or success varies by species. Mice and rabbits, for example, are prolific producers of offspring. Horses, ... Read full story
 12/1/2006
Love is in the Air: Estrus Odor Recognized Across Species Lines   *
French researchers with the Institut National de la Recherche Agronomique have discovered that the odors associated with females in estrus can be identified by different mammals. In the study, male rats were exposed to the feces of foxes, horses, and other rats. Regardless of the species, the male rats displayed erections after smelling the feces ... Read full story
 10/1/2006
Book Excerpt: Manipulation of the Breeding Season  *
Editor's Note: This is an excerpt from Breeder's Guide to Mare, Foal, and Stallion Care by Christine Schweizer, DVM; Christina Cable, DVM; E.L. Squires, PhD. This book is available from www.ExclusivelyEquine.com. Left to her own devices, a mare cycles more or less between April and October. Each estrous cycle (or the length of time between ovulations) ... Read full story
 9/20/2006
Orphans and Twins in Horses  *
People new to the breeding and raising of horses probably have never experienced the challenge of raising an orphan foal or feeding a foal whose mother is producing little or no milk. The solutions to both problems can be time consuming and somewhat of an ordeal. A foal can become an orphan after losing its mother to sickness such as colic or uterine ... Read full story
 7/24/2006
Book Excerpt: Rushing a Mare  *
Editor's Note: This is an excerpt from Understanding Your Horse's Behavior by author and equine behavior specialist Sue McDonnell, PhD, Certified AAB. The book is available from www.ExclusivelyEquine.com. I'm a veterinarian asking this question on behalf of clients who are standing a stallion at stud. The stallion isn't new to breeding or to this ... Read full story
 3/15/2006
AAEP Convention 2005: Reproduction/Perinatology Forum  *
It's important that all the players in an industry speak the same language, and the Reproduction/Perinatology Forum on Dec. 3 at the American Association of Equine Practitioners convention in Seattle, Wash., tried to help equine veterinarians do just that. The main topic of discussion was the updating of several reproduction-related terms and definitions ... Read full story
 2/17/2006
A Day in the Life of A Breeding Farm  *
A world away from hitting the finish line of a classic race in front of tens of thousands of screaming fans, the dream is reborn. In the quiet of a gray winter morning, when the earth throws its warmth off into the cold air and envelops fields in a shroud of fog, it begins. A van door slides open; a stall gate unlatched; hooves rhythmically hit ground; ... Read full story
 6/13/2005
Umbilical Cord Length and Foal Health  *
A long umbilical cord increases the risks for abortions and stillbirths in horses. Complications include strangulation of the foal and excessive cord twisting, writes Karin Bosh in a recent edition of Equine Disease Quarterly, a newsletter published by the University of Kentucky (UK). In a recent study by UK and veterinarians from Hagyard Equine Medical ... Read full story
 5/23/2005
Kingmambo Taken Out of Stud Duty  *
Prominent Thoroughbred stallion Kingmambo, who was taken out of stallion duty in late February at William S. Farish's Lane's End Farm near Versailles, Ky., because of an injured leg, will spend about three more weeks on the sidelines due to an arthritic condition in his lower neck, as well as more recently suspected involvement of an EPM infection. ... Read full story
 3/11/2005
AAEP Convention 2004 Wrap-Up: Reproduction  *
Pregnancies from Euthanized Mare Ovaries "You think breeding mares on foal heat is tough, try dead mares!" said Elaine Carnevale, DVM, PhD, professor in equine reproduction in the department of biomedical sciences at Colorado State University (CSU), with a laugh as she began her talk following a presentation on foal heat breeding success. Her presentation ... Read full story
 3/3/2005
LSU Theriogenology Program Aids in Reproduction for Large and Small Animals  *
The theriogenology program at Louisiana State University's (LSU) School of Veterinary Medicine manages reproduction in its clinical practice and reproductive research regarding horses, dogs, and other animals. According to Dr. Dale Paccamonti, professor and service chief of theriogenology, and Dr. Sara Lyle, an instructor in theriogenology, approximately ... Read full story
 1/24/2005
Handling a Hostile Broodmare  *
My mare just had a colt today and I have a concern about it because she is 13 years old and not broken. She had been broken three times prior to me getting her, and she won't come near anyone. My question is: How will I be able to mess with the colt without the mare coming after me? She is very protective of the colt, and I am very concerned about ... Read full story
 3/1/2004
AAEP 2003: The High-Risk Mare  *
Breeders and veterinarians understand the risks and frustrations involved in trying to obtain that perfect, healthy foal. Sometimes there are added complications of a mare which has problems that might prevent or hinder her ability to produce a foal. With veterinary care and knowledge of the mare’s problems, that dream foal can become a reality even ... Read full story
 1/31/2004
Reproduction/Perinatology Forum at AAEP 2003  *
Veterinarians interested in reproduction and perinatology (the foal immediately after birth) crowded into the Reproduction/Perinatology Forum at the 2003 American Association of Equine Practitioners' convention to discuss mare reproductive loss syndrome (MRLS), terminology for the mare breeding soundness examination, vaccination of broodmares with ... Read full story
 1/31/2004
The Equine Placenta: Mare and Foal Interactions   *
Abby L. Fowden, University of Cambridge, UK, discussed nutritive and endocrine functions of the equine placenta at the first Equine Placenta Workshop held at the Gluck Equine Research Center at the University of Kentucky on Dec. 5-6. She said the functions of the placenta are as a barrier, for transport of nutrients and waste, nutrient production, ... Read full story
 12/9/2003
Reproductive Specialists   *
Is your best mare still not pregnant after three breedings? Is the stallion from whom you ship semen dropping off in fertility? Would you like to know about embryo transfer for your great cutting mare in order to keep her in competition? You might need to consult a theriogenologist! (Don't let the name stop you--that's just another name for veterinary ... Read full story
 12/1/2003
The Facts of Life  *
The fertilization of an egg and subsequent growth of one tiny cell into the perfect foal is a very complex process. Understanding the various stages of development can help you understand how pregnancies can be challenged and what's going on in the event of a problem. Pregnancy in the mare can be divided into four main events--fertilization, early ... Read full story
 12/1/2003
Summer Meetings Offer Diverse Equine Continuing Education  *
The American Association of Equine Practitioners (AAEP) will sponsor two continuing education meetings this summer in Fort Collins, Colo. Scheduled for July 28-30, the first-ever Focus meeting and the 11th annual Practice Management Seminar offer practitioners two separate paths of study for one registration fee. Focus is a new meeting that spotlights ... Read full story
 7/1/2003
Genetic Defects Statement Issued by the American Association of Equine Practitioners   *
The American Veterinary Medical Association (AVMA) recently re-stated a policy that surgical correction of "genetic defects" for the purposes of concealing the defect is unethical. The policy states that if surgical correction is undertaken for the purpose of improving the health of the individual, then it should be accompanied by sterilization to ... Read full story
 5/1/2003
Repro in the Rockies  *
The center of the Colorado State University (CSU) veterinary school's equine reproductive universe is its 22,000-square-foot Animal Reproduction and Biotechnology Laboratory and a smaller satellite, the Equine Reproduction Laboratory. In these facilities, faculty members, graduate students, post-doctorate fellows, and visiting scientists from around ... Read full story
 2/1/2003
Keeping a Stallion With a Foaling Mare, or Mares  *
We have a mare and stallion together in a pasture. We borrowed a stallion in August just to breed this mare. They have been together since then, and we just had the mare checked for the first time since they were together and found out that the mare is pregnant. Of course, we can't be sure when the foal is due. We also just learned that the stallion's ... Read full story
 12/1/2002
Foal Sex Selection   *
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 and can sort sperm, but it's time-consuming and damages sperm, leading to great losses during the procedure. ... Read full story
 11/1/2002
Expecting Company?  *
The birth of a foal can be a nerve-racking, not to mention exhausting, experience--and not just for the mare. The humans involved can expect many sleepless nights in anticipation of being there for the big moment. An attended delivery will allow the detection of any problems during the birth, or immediately after. That means if there is a problem, ... Read full story
 11/1/2002
Bluegrass Equine Reproduction Symposium: Stallions  *
A four-day seminar focusing on reproduction education for veterinarians was hosted by Hagyard-Davidson-McGee veterinary firm in Lexington, Ky., Oct. 23-26 This is the fifth year for a fall seminar hosted by the group, which now alternates with a critical care symposium in odd-numbered years. The first day offered a series of wet labs on pathology, ... Read full story
 10/30/2002
Varner Wins Theriogenology Award  *
The American College of Theriogenologists (ACT) recently honored Dickson Varner, DVM, Dipl. ACT, of Texas A&M University, as the 2002 Theriogenologist of the Year. The award is given annually to recognize outstanding achievement in the field of animal reproduction research. Varner is world-renowned for his expertise in stallion reproduction, ... Read full story
 10/23/2002
Purina Veterinary Conference  *
Only 20 miles from downtown St. Louis, Mo., is a 1,200-acre research farm owned by the nutrition company Purina Mills. On Oct. 3-5, 140-plus veterinarians and another 50 Purina Mills representatives gathered to tour that research facility and hear speakers lecture on various topics during the Purina Mills Veterinary Nutritional Conference. Three of ... Read full story
 10/16/2002
AQHA Settles Embryo Transfer Lawsuit  *
The American Quarter Horse Association has eliminated all restrictions regarding the registration of foals produced through embryo transfer as part of an out-of-court settlement with a coalition of breeders. For a couple of years, the AQHA has been fighting a lawsuit that claimed a rule limiting the registration of embryo transfer foals to one per ... Read full story
 6/12/2002
Emergency Breeding Procedures Filed for Kentucky Farms  *
Due to concerns resulting from last year's foal losses attributed to Mare Reproductive Loss Syndrome (MRLS), the Kentucky Department of Agriculture today filed emergency regulations regarding procedures that are followed when breeding an imported mare in the state. State Veterinarian Don Notter, DVM, met with an equine advisory committee comprised ... Read full story
 2/4/2002
Links to the Future  *
"Go with your strengths, and collaborate as effectively as possible." Those were the two baseline rules that Bill Moyer, DVM, head of the Department of Large Animal Medicine & Surgery at Texas A&M's College of Veterinary Medicine, and Bryan Johnson, PhD, head of the Department of Animal Science in Texas A&M's College of Agriculture and ... Read full story
 2/1/2002
LSU Equine Veterinary Research: Young and Growing  *
The Thoroughbred racing and breeding industries in Louisiana were influential in funding and building the veterinary school at Louisiana State University in Baton Rouge, but the school serves all the state's horses and their owners. Although one of the newest schools in terms of number of classes graduated, LSU's School of Veterinary Medicine gets ... Read full story
 10/16/2001
Central Kentucky to Get Reproduction/Podiatry Center  *
Rood and Riddle Equine Hospital has begun construction on a new facility that will be home to a podiatry center and a stallion and mare reproduction center. The facility’s new 20-stall barn will be completed by December 15, and the main facility should be finished by March 15. Scott Morrison, DVM, a veterinarian with training in foot care, will head ... Read full story
 10/5/2001
Pioneer In Equine Veterinary Medicine Honored By Colorado State  *
Colorado State honored one of the nation's pioneers in equine reproductive science in a ceremony Dec. 1, at the dedication of the Equine Center as the B.W. Pickett Equine Center. Pickett, who first came to Colorado State in 1967 as director of the Equine Reproduction Laboratory, was named director of the Animal Reproduction Laboratory in 1971. He ... Read full story
 12/8/2000
Sexed Semen and Artificial Insemination   *
Four new foals are leading the field in the race to develop insemination techniquest that could forever change the face of the multibillion-dollar international horse-breeding industry. XY, Inc., a Colorado biotech company, has announced the birth of the world's first foals to be born from mares impregnated via artificial insemination combined with ... Read full story
 9/1/1999
Clemson University Discovery Could Be Used For Fescue Toxicosis  *
A medication used to treat nausea is now helping horse breeders produce healthier mares and foals and may someday help address problems of infertility in humans. Dee L. Cross, a Clemson University animal scientist, hypothesized that the medication, now patented as Equidone, could be useful in treating a condition called fescue toxicosis in pregnant ... Read full story
 7/30/1999
Effects Of Weaning On Growing Foals   *
Every foal must be weaned from its dam at some point. However, when and how the weaning process is undertaken may have significant effects on the growing horse. One of the physiological responses often noted at weaning is a reduction in rate of weight gain. In a study on Thoroughbred farms in Central Kentucky, average daily gain in the week following ... Read full story
 1/22/1999
USDA Amends Embryo Collection User Fee Regulations   *
The U.S. Department of Agriculture is amending user fees for the inspection and approval of embryo collection centers. USDA's Animal and Plant Health Inspection Service charges user fees for providing veterinary diagnostic services and import- and export-related services for live animals and birds, animal semen and embryos, and animal products. Currently, ... Read full story
 12/31/1998
First Sex-Selected Filly Born   *
Through the collaborative efforts of Colorado State University, USDA, MoFlo, and the U.S. Department of Agriculture and Cytomation the world's first sex-selected filly was born August 6, 1998. The filly, Call Me Madam, was made possible by new cell-sorting technology developed by XY Inc. XY Inc. originally intended to provide semen-sexing for the ... Read full story
 8/21/1998
Conceptus-Maternal Communication In Horses   *
Early conceptus loss causes a significant financial burden to horse breeders. In the January 1998 issue of the Lloyd's Equine Disease Quarterly, maternal recognition of pregnancy and the relationship of progesterone, prostaglandin F2a(PGF) and oxytocin were discussed. This article will examine some aspects of the communication that occur between the ... Read full story
 4/17/1998




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