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Related Experiment Videos

Reproductive performance in gilts through their first two parities.

C Linde, S Einarsson, H Pettersson

    Nordisk Veterinaermedicin
    |July 1, 1984
    PubMed
    Summary

    This study analyzed fertility in 766 gilts, finding key factors like age at first breeding and season influence reproductive success. Anoestrus was a primary reason for culling gilts and sows.

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    Area of Science:

    • Animal Science
    • Reproductive Biology
    • Swine Production

    Background:

    • Understanding gilt and sow reproductive performance is crucial for efficient swine operations.
    • Factors influencing fertility, such as age at first breeding and seasonal effects, require detailed investigation.

    Purpose of the Study:

    • To evaluate fertility parameters in a commercial swine population.
    • To identify key factors affecting gilt and sow reproductive efficiency and culling rates.

    Main Methods:

    • Data collection from 766 gilts across 12 breeding and commercial herds.
    • Analysis of reproductive metrics including age at first breeding/farrowing, litter size, farrowing rates, and culling reasons.
    • Statistical evaluation of seasonal and month-of-birth influences on fertility and ultrasonic index correlations.

    Main Results:

    • Average age at first breeding was 244.5 days, with litter sizes around 9-10 piglets.
    • Anoestrus was the main reason for gilt culling (7.7%), while overall sow culling reached 20.7%.
    • Month of birth and season significantly impacted gilt age at first breeding, farrowing dates, and sow rebreeding intervals.

    Conclusions:

    • Gilt and sow fertility are influenced by seasonal and birth month factors.
    • Anoestrus remains a significant challenge in swine reproduction, necessitating management strategies.
    • Ultrasonic index did not correlate with lowered fertility, but showed a slight inverse relationship with age at first breeding.

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