Abortion and Embryonic Death


World Vets Meet

January 01, 2010

The 2009 World Equine Veterinary Association Congress included discussions of Rhodococcus equi, which causes foal pneumonia; sleep disorders and seizures; guttural pouch problems; late-term abortion; and tendon sheath problems/lameness.... Read More


Placentitis Research Could Help Prevent Late-Term Abortions

December 18, 2009

Placentitis, which often is caused by an ascending infection that enters the mare's uterus through the cervix, is the single most important cause of premature delivery of a foal. Placentitis accounts for nearly one-third of late-term aborti... Read More


First Leptospirosis Abortions Reported in England

December 04, 2009

Diagnostic pathologists at the Animal Health Trust (AHT), Newmarket recently published the first report of equine abortions in England caused by leptospirosis.... Read More


Late Term Abortion in Mares Reviewed for World Equine Veterinarians

November 07, 2009

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... Read More


MRLS Foal Losses in Kentucky Increased Slightly in 2009

August 12, 2009

Between May 5 and June 15, the Livestock Disease Diagnostic Center (LDDC) diagnosed 13 foal loss cases caused by mare reproductive loss syndrome (MRLS) in Central Kentucky. This number was up slightly from 2003-2008 when only three to five cases... Read More


Kentucky Reports Mare Reproductive Loss Syndrome Cases

May 13, 2009

The University of Kentucky Livestock Disease Diagnostic Center (LDDC) reported today (May 13) that two fetal necropsy cases had findings consistent with mare reproductive loss syndrome (MRLS), the disease that in 2001-2002 in Kentucky caused an... Read More


Early Embryonic Loss and Genetics

April 22, 2009

Chromosomes are large segments of DNA wound around special proteins within each cell's nucleus. They contain nearly all of the body's genetic material. Horses have 64 chromosomes (or 32 pairs) including the two sex chromosomes (XY in males and X... Read More


Monitoring and Preventing Equine Herpesvirus Abortions

August 03, 2008

The monitoring of abortions attributable to equine herpesvirus-1 (EHV-1) initiated in 1957 among the Thoroughbred mare population of Central Kentucky has continued annually for the past 51 years. The number of EHV-1 abortions per 1,000 pregnant... Read More


MRLS: Caterpillar Population Up Sharply from 2007

May 09, 2008

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... Read More


Foal Diseases

May 08, 2008

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Leptospirosis: What Is It?

March 01, 2008

Don’t overlook this "bug" that can cause abortion and uveitis (moon blindness).

Many horse people don't know that much about leptospirosis. If you have heard of it, it is probably in... Read More


Laboratory Testing Can Help Pinpoint Cause of Abortion

February 05, 2008

When a mare aborts a foal, it can be a traumatic event for both horse and owner. While emotionally and financially expensive, abortion is not terribly uncommon in the equine breeding business. As many as 30% of broodmares fail to produce a... Read More


Reproductive Hormones Directly Influence Embryo Development

January 26, 2008

A group of Dutch researchers reported evidence that the equine conceptus (i.e., the embryo and associated membranes) might be directly responsive to the reproductive hormones progesterone and estrogen,... Read More


Fetotomy: A Viable Option for Resolving Dystocia Caused by Nonviable Foals

August 06, 2007

Fetotomy (the vaginal removal from a mare of a dead fetus in two or more pieces) is a viable option for resolving severe dystocia (difficult birth), with better mare survival rates than those cases involving Cesarean section, according to... Read More


From Breeding to Birth

February 01, 2007

Testing innovative techniques and brushing up on common procedures are the lifeblood of advancing any medical specialty, and the field of equine reproduction is no exception. Veterinarians are always looking for new ways to improve procedures they... Read More


Diagnosis, Management, and Diagnostic Investigation of Abortion

February 01, 2007

Careful management of pregnant mares and preparation for parturition is essential to help prevent cases of equine abortion--losses of pregnancy between 150-300 days of gestation. "The incidence of abortion in mares ranges from 5-15%, and this ha... Read More


Buserelin Use in the Anestrus Mare

February 01, 2007

A compounded drug has shown considerable promise in treating anestrus mares--those that are not cycling and thus are difficult to impregnate. Walter Zent, DVM, of Hagyard Equine Medical Institute, described his experience using Buserelin in mare... Read More


Oregon State Study Links Virus to 2001 Kentucky Abortions

June 23, 2006

Veterinary researchers at Oregon State University (OSU) announced today that they have linked a major abortion epidemic in Central Kentucky mares in 2001 to vesivirus infection. This marks the first time the virus has been... Read More


Herpes by the Numbers

June 08, 2006

A guide to nine types of herpesvirus can cause different problems in your horse.... Read More


Herpesvirus Management Basics

June 08, 2006

There are basic tools a farm, stable, or barn manager can use to reduce the incidence of equine herpesvirus.... Read More


Umbilical Cord Length and Foal Health

May 23, 2005

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... Read More


Fetus at Risk

March 03, 2005

When a pregnant mare develops a problem that puts her fetus at risk, what can be done? Some of these foals can be saved if the problem can be discovered early and the mare given proper treatment to reverse the condition.

Jon Palmer, VMD,... Read More


Australian Mystery Disease

January 01, 2005

Reports are circulating that a disease similar to mare reproductive loss syndrome (MRLS) is occurring in Australia. In a correspondence, Nigel Perkins, BVSc, MS, Dipl. ACT, FACVSc, of the private consulting firm AusVet Animal Health Services,... Read More


Leptospirosis in Central Kentucky

December 17, 2004

High incidences of leptospirosis-induced abortions in Central Kentucky horses could be caused by a tandem effect of temperature and precipitation in certain years, said Capt. David Hall of the U.S. Air Force, who defended his Masters thesis on... Read More


Australian Mystery Disease Update

December 01, 2004

On Dec. 1, we received additional information from the Hunter Valley Equine Research Centre (HVERC), a research facility adjacent to Scone racetrack in the heart of the Australian breeding area, on a problem that is causing sporadic abortions... Read More