THE MERCK VETERINARY MANUALmultimedia

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  • Pregnancy Determination in Horses
  • Video Sonogram of 30-Day Conceptus

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    At 30 days of gestation the dorsal yolk same is equal in size to the developing allantoic cavity. A heartbeat should be evident in the embryo proper after 25 days of gestation.

    Courtesy of Dr. Patricia Sertich.

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