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Hydrops amnii in a mare

P L Sertich1, V B Reef, R M Oristaglio-Turner

  • 1Department of Clinical Studies, University of Pennsylvania, School of Veterinary Medicine, Kennett Square 19348-1692.

Journal of the American Veterinary Medical Association
|May 1, 1994
PubMed
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Hydrops amnii, a rare pregnancy condition in horses, involves excessive amniotic fluid accumulation. This case highlights diagnostic challenges and differentiates it from hydrops allantois in a Welsh Pony mare.

Area of Science:

  • Reproductive medicine
  • Veterinary ultrasonography
  • Equine perinatology

Background:

  • Hydrops amnii is a rare pregnancy complication characterized by excessive amniotic fluid accumulation.
  • This condition is most commonly documented in cattle and sheep, with fewer reports in horses.
  • Accurate diagnosis is crucial for managing affected pregnancies and ensuring mare and foal well-being.

Observation:

  • A multiparous pregnant Welsh Pony mare presented with anorexia, dyspnea, and abdominal distension.
  • Uterine ultrasonography revealed a significant excess of amniotic fluid surrounding the fetus.
  • Transabdominal ultrasonography was employed to distinguish between hydrops amnii and hydrops allantois.

Findings:

  • The mare aborted a 7-month-old fetus exhibiting brachygnathia (underbite).

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  • The fetus had a large, edematous umbilical cord, suggesting potential complications.
  • Ultrasonographic differentiation confirmed the diagnosis of hydrops amnii.

    • Implications:

    • This case expands the understanding of hydrops amnii occurrence in equine pregnancies.
    • It underscores the utility of ultrasonography in diagnosing complex reproductive conditions in mares.
    • Further research into the etiology and management of equine hydrops amnii is warranted.