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Related Experiment Videos

Detection of estrus by three methods.

J S Stevenson, J H Britt

    Journal of Dairy Science
    |December 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    Detecting estrus in postpartum Holstein cows using a testosterone-treated marking heifer showed the highest overall accuracy (41%) compared to visual observation or rump-mounted detectors. This method offers improved estrus detection efficiency for dairy herds.

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    Area of Science:

    • Animal Science
    • Reproductive Biology
    • Dairy Cattle Management

    Background:

    • Accurate estrus detection is crucial for efficient artificial insemination and reproductive success in dairy cows.
    • Traditional visual observation by herdsmen can be labor-intensive and prone to errors.
    • Newer technologies and methods aim to improve the accuracy and efficiency of estrus detection.

    Purpose of the Study:

    • To compare the accuracy and efficiency of three different estrus detection methods in postpartum Holstein cows.
    • To evaluate the effectiveness of visual observation, rump-mounted electronic detectors, and a testosterone-treated marking heifer for estrus detection.

    Main Methods:

    • 88 postpartum Holstein cows were divided into three groups for estrus detection.
    • Group I (control) relied solely on visual observation by herdsmen.

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  • Group II used MateMaster rump-mounted detectors, while Group III was exposed to a testosterone-treated marking heifer.
  • Estrus detection accuracy was confirmed by serum progesterone levels.

    • Main Results:

    • The testosterone-treated heifer method (Group III) achieved the highest individual accuracy (79%) and overall accuracy (41%).
    • Visual observation (Group I) had 68% accuracy and 35% overall accuracy.
    • Rump-mounted detectors (Group II) showed 66% accuracy and 34% overall accuracy.
    • Detection efficiencies were similar across all groups (51-52%).

    Conclusions:

    • A testosterone-treated marking heifer is a more accurate method for estrus detection in postpartum Holstein cows compared to visual observation or rump-mounted detectors.
    • While detection efficiency was similar, overall accuracy was highest with the marking heifer, indicating its potential for improving reproductive management in dairy herds.