Fordham D P, Rowlinson P, McCarthy T T
Faculty of Agriculture, University of Newcastle upon Tyne.
Res Vet Sci. 1988 May;44(3):366-74.
The milk and body temperatures of 15 cows were monitored twice daily at milking times, over a total of 30 oestrous periods. The best determination of oestrus was based on a temperature rise of at least 0.2 degree C over the corresponding mean temperature of the three preceding days. This resulted in 72 +/- 16 per cent of oestruses, predicted by serial progesterone assays, being successfully detected by serial progesterone assays, being successfully detected and 11 +/- 3 per cent of false positives. The variable extent of the temperature rise at oestrus and the large daily fluctuations in temperature for individual cows, resulted in a moderate oestrus detection rate accompanied by an unacceptable level of false positives.
在总共30个发情周期内，每天在挤奶时对15头奶牛的体温和乳温进行两次监测。发情的最佳判定依据是体温比前三天的相应平均体温至少升高0.2摄氏度。这使得通过连续孕酮检测预测的发情中有72±16%被成功检测到，假阳性率为11±3%。发情时体温升高程度的变化以及个体奶牛体温的大幅每日波动，导致发情检测率中等，同时伴有不可接受的假阳性水平。
