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Kidney, Ureter, and Bladder (KUB) StudiesKidney, Ureter, and Bladder (KUB) studies are standard diagnostic imaging procedures used to assess the anatomy of the urinary system. They are commonly utilized for patients experiencing abdominal pain or urinary symptoms. By using a simple X-ray of the abdomen, KUB studies can reveal structural and pathological abnormalities within the kidneys, ureters, and bladder. These studies are particularly valuable in diagnosing kidney stones, urinary...
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Related Experiment Video

Updated: Jan 31, 2026

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A study on puberty and oestrus in gilts.

L Eliasson

    Zentralblatt Fur Veterinarmedizin. Reihe A
    |January 1, 1989
    PubMed
    Summary

    Puberty onset and subsequent estrous cycles in gilts show variations. Proestrus duration decreased with age at puberty, and some gilts exhibited irregular estrous cycles.

    Area of Science:

    • Veterinary Science
    • Animal Reproduction

    Background:

    • Understanding gilt reproductive physiology is crucial for swine production.
    • Puberty and estrous cycle characteristics influence breeding efficiency.

    Purpose of the Study:

    • To investigate estrous symptoms at puberty and during the two subsequent estrous periods in gilts.
    • To analyze the duration of proestrus and its relationship with age at puberty.
    • To determine the incidence of anovulatory estrus and lack of standing reflex.

    Main Methods:

    • Observation of estrous symptoms twice daily in 369 Swedish Yorkshire gilts (160-260 days of age).
    • Progesterone level determination from blood samples collected from 170 days until puberty.
    • Statistical analysis of proestrus duration, estrous cycle length, and symptom correlations.

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    Main Results:

    • Proestrus duration was significantly longer during the first estrous period compared to subsequent periods (p ≤ 0.001).
    • Proestrus duration decreased with increasing age at puberty (p ≤ 0.05).
    • Twenty percent of gilts did not display a standing reflex, and 2% experienced anovulatory estrus at puberty.

    Conclusions:

    • Estrous cycle parameters, including proestrus duration, exhibit significant variation in gilts.
    • Age at puberty is a key factor influencing proestrus length.
    • A notable percentage of gilts may not show typical estrous behaviors or ovulate at puberty.