THE MERCK VETERINARY MANUALmultimedia

Location(s)

  • Pregnancy Determination in Horses
  • Sonogram of 24-day conceptus, mare

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    Sonogram of 24-day conceptus, mare

    At 24 days, the allantoic cavity (small anechoic space) is first visible just ventral to the embryo proper. The yolk sac is the large anechoic space seen dorsally.

    Courtesy of Dr. Patricia Sertich.

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