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S Borchardt¹, T A Burnett², T C Bruinjé³

¹Farm Animal Clinic, Division for Ruminants and Camelids, Unit for Reproduction Medicine and Udder Health, School of Veterinary Medicine, Freie Universitaet Berlin, 14163 Berlin, Germany.

JDS communications

|September 9, 2025

概括

自动活动监测 (AAM) 显示,在自愿等待期 (VWP) 期间,可能会确认奶牛的排卵. 然而,AAM却没有.

科学领域:

兽医医学兽医医学兽医医学
动物繁殖动物繁殖
乳制品科学乳制品科学

背景情况:

精确检测雌性表达和排卵状态对于成功的乳牛人工授精计划至关重要.
自愿等待期 (VWP) 是生殖管理的一个关键阶段.
自动化活动监测 (AAM) 系统为实时监测牛行为提供了一个潜在的工具.

研究的目的:

评估自动化活动监测 (AAM) 系统在检测母牛雌性表达和排卵状态方面的有效性.
评估AAM在自愿等待期 (VWP) 期间识别排卵事件的准确性.

主要方法:

通过使用涉及2,198头奶牛的四项研究的数据进行了元分析.
研究包括使用AAM评估雌激素表达,并通过血液孕激素 (P4) 测量确认排卵状态.
使用MedCalc分析数据,计算聚合比例,灵敏度,特异性和预测值.

主要成果:

排卵奶牛的综合比例为79.8%,具有显著的异质性.
在64.0%的奶牛中,AAM检测到雌性表达,同样具有显著的异质性.
识别排卵奶牛的AAM灵敏度为70.3%,特异性为60.0%,具有高的积极预测值 (88.1%),但低的负面预测值 (35.3%).

结论:

自动化活动监测 (AAM) 系统在早期哺乳期奶牛中证实排卵的可能性很大.
由于AAM没有发出雌性警报,这并不证实无排卵状态.
显著的异质性表明在不同研究和农场中AAM系统精度或配置的变化.

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