Predicting Foaling: Calving Alert System Might Work for Horses, Too

The accelerometer is designed to detect subtle restlessness, the researchers said. Small movements, such as weight-shifting or minor head-bobbing, could be caused by distress related to the first stage of parturition, they said.
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Predicting Foaling
Overall, although it was a small study with only eight horses, the researchers found the accelerometer system to be consistent and reliable for predicting foaling. | Photo: Anne M. Eberhardt/The Horse

It’s never easy to know when a mare’s going to foal. Sure, you can detect the approximate month based on a gestational calendar. And you know you’re getting close when you see the udder start to fill. But guessing the precise moment labor will start is nearly impossible—and, unfortunately, most labor detection methods just aren’t very reliable, a research team based in Germany said.

But human presence is critical when a mare foals in case intervention is necessary during a difficult birth, the researchers said. That’s why they recently investigated a new foaling detection system based on an accelerometer. The idea isn’t to check heart rate or up-and-down movements but, rather, “subtle restlessness,” explained Christine Aurich, DVM, PhD, head of the Graf Lehndorff Institute, in Neustadt.

“The restlessness we detected is hardly detectable by the eye of the observer,” Aurich said. “So it is not lying down and standing up. In fact, the mares are often standing quite still, but they show small movements like weight-shifting or minor bobbing of the head. These movements are probably caused by some distress related to stage one of parturition (when the fetus turns)

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Passionate about horses and science from the time she was riding her first Shetland Pony in Texas, Christa Lesté-Lasserre writes about scientific research that contributes to a better understanding of all equids. After undergrad studies in science, journalism, and literature, she received a master’s degree in creative writing. Now based in France, she aims to present the most fascinating aspect of equine science: the story it creates. Follow Lesté-Lasserre on Twitter @christalestelas.

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