Mules As Moms? Surprisingly Excellent Options for Equine Embryo Transfer

Though female mules can’t naturally reproduce, they have an “incredible” maternal instinct, Dr. Eduardo L. Gastal, professor at Southern Illinois University, Carbondale, told The Horse. Surprisingly, mules have the ability to carry the embryo of a mare, gestate and produce milk. To determine if mules could host embryos, Gastal and his research team transferred 8-day-old […]

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Let There Be Light: Length Of Day Used As Mare Management Tool

Mares have been put under artificial light in order to encourage the onset of seasonal reproductivity for years; extending the length of “daylight” to about 16 hours is a common management tool on may farms. Research has shown that blue light, which has a shorter wavelength, is very effective at suppressing melatonin secretion and initiating […]

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Dr. Clare Card: Studying Early Embryonic Death In Horses

Dr. Claire Card, of the Western College of Veterinary Medicine Department of Large Animal Clinical Sciences, has been searching her entire career for a means to avoid early embryonic death in horses. Card says that about 15 percent of equine pregnancies are lost very early on, which has a large economic impact on the equine […]

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Age-Old Question: How Old Is Too Old To Breed A Mare?

Generally, mares are past their reproductive prime when they reach 15 to 16 years old. There are mares that can carry and deliver healthy foals into their 20s, but the majority of them have had multiple successful pregnancies before. To see if a mare can be bred, a veterinarian should perform a breeding soundness exam […]

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Length Of Mare’s Pregnancy Affected Maternal Lineage

A study of Warmblood horses conducted in Europe showed that maiden and aged mares were more likely to have female foals than male. Researchers also found that the maternal lineage also influenced the length of gestation. “To the best of our knowledge, this has neither been proven for the horse nor for other mammalian species […]

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Zenyatta pregnancy doing well

An ultrasound taken Wednesday shows that Zenyatta is holding her first pregnancy. “I feel great about it,” owner Jerry Moss said. “We’re really pleased with everything.”

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