Positive correlations of age and parity with plasma anti-Müllerian hormone concentrations in Japanese Black cows

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  • KOIZUMI Motoya
    United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi 753-8515, Japan Hokusatsu Agricultural Mutual Aid Association, Kagoshima 895-1813, Japan
  • KADOKAWA Hiroya
    United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi 753-8515, Japan

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  • Positive correlations of age and parity with plasma anti-Mullerian hormone concentrations in Japanese Black cows

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Abstract

<p> Anti-Müllerian hormone (AMH) is secreted from the preantral and small antral follicles. It regulates follicle development and inhibits follicular atresia. This study examined how age, parity, and time after parturition affect plasma AMH concentrations in Japanese Black cows. We measured plasma AMH concentrations in primiparous, secundiparous, and multiparous (third parity or higher) cows at four time points: day 2 (day 0 = parturition), day 8, 2 days before first postpartum ovulation (pre-1stOv), and 12 days after first ovulation (post-1stOV). We observed a positive correlation between plasma AMH concentration and age (in months) and parity on day 2, day 8, and post-1stOV, but not on pre-1stOv. The multiparous cows had higher AMH concentrations than primiparous cows throughout the postpartum period (P < 0.05). Our results indicate that age and parity significantly influence plasma AMH concentrations in Japanese Black cows during the voluntary waiting period.</p>

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