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Related Experiment Videos

Ultrasonic echography in the mare

F Chevalier, E Palmer

    Journal of Reproduction and Fertility. Supplement
    |January 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    Ultrasonic echography accurately diagnoses pregnancy in mares by Day 14. This study evaluated early pregnancy diagnosis, embryonic loss, and twinning rates using ultrasound, providing key insights for equine reproduction management.

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    Area of Science:

    • Veterinary Medicine
    • Reproductive Biology
    • Diagnostic Imaging

    Background:

    • Early pregnancy diagnosis in mares is crucial for reproductive efficiency.
    • Ultrasonic echography offers a non-invasive method for assessing equine pregnancy.
    • Understanding embryonic loss and twinning rates is vital for successful breeding programs.

    Purpose of the Study:

    • To assess the accuracy of ultrasonic echography for early pregnancy diagnosis in mares.
    • To determine the incidence of twinning and early embryonic loss.
    • To identify factors influencing pregnancy outcomes in mares.

    Main Methods:

    • Performed 7438 ultrasonic examinations on 4688 mares across two breeding seasons.
    • Evaluated diagnostic accuracy for pregnancy and non-pregnancy.

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  • Analyzed vesicle characteristics to differentiate conceptuses from cystic structures.
  • Monitored for twins and calculated embryonic loss rates.

    • Main Results:

    • Positive pregnancy diagnosis accuracy exceeded 95%; non-pregnancy diagnosis accuracy was over 84%.
    • Twinning rates ranged from 2.6% to 2.8% in early pregnancy (before Day 30).
    • Early pregnancy loss (Days 23-43) was 5.3%, with total embryonic loss at 9%.

    Conclusions:

    • Ultrasonic echography is a highly accurate tool for early pregnancy diagnosis in mares.
    • Early pregnancy loss and twinning rates are significant factors in equine reproduction.
    • No critical period for early mortality or effect of reproductive status on loss was identified.