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Related Experiment Videos

Retained placenta and leucocytic activity.

J W Gunnink

    The Veterinary Quarterly
    |April 1, 1984
    PubMed
    Summary

    Peripheral leucocyte activity is crucial for placenta expulsion in cows. Without this immune cell function, retained placenta occurred in all cases, highlighting its importance in preventing postpartum complications.

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    Area of Science:

    • Veterinary Immunology
    • Reproductive Immunology
    • Bovine Medicine

    Background:

    • The postpartum placenta can be recognized as foreign tissue by the dam's immune system.
    • Peripheral leucocyte activity plays a potential role in the timely expulsion of the placenta.

    Purpose of the Study:

    • To investigate the relationship between peripheral leucocyte activity and placental expulsion in cows.
    • To determine if leucocyte function influences the incidence of retained placenta.

    Main Methods:

    • Study involved 262 cows.
    • Assessed leucocyte activity against cotyledon using chemotaxis in a Boyden Chamber.
    • Quantified leucocyte numbers within the cotyledon at parturition.

    Main Results:

    • 100% incidence of retained placenta was observed in the absence of leucocytic activity.
    • Positive chemotaxis was associated with a 2.6% incidence of retained placenta.
    • Negative chemotaxis correlated with a 35.6% incidence of retained placenta.

    Conclusions:

    • Peripheral leucocyte activity is essential for successful placental expulsion in cattle.
    • Impaired leucocyte chemotaxis significantly increases the risk of retained placenta.
    • Leucocyte function is a critical factor in preventing postpartum complications in dairy cows.

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