López-Gatius F, Camón-Urgel J
Department of Animal Production, Polytechnical University of Catalonia, Lleida, Spain.
Zentralbl Veterinarmed A. 1991 Aug;38(7):553-6. doi: 10.1111/j.1439-0442.1991.tb01047.x.
Data were from 6084 normal repeat to second service cows, visually detected in estrus, in a commercial artificial insemination program on a.m./p.m. schedule. The percentage of cows confirmed in estrus by rectal examination and inseminated after palpation was 96.2. The remainder of the cows were not inseminated and non-return rate for these cows was 86.9% (150-day non-return). In cows confirmed in estrus, the percentage of cows ready for service at palpation was 96.1 and the 150-day non-return percentage for these cows (43.9) was different from those cows in which estrus and insemination were considered incorrectly timed (26.7%). These results suggest that the efficiency of reproduction in dairy herds may be improved by examination per rectum of the genital organs at insemination as an effective complement to visual detection of estrus.
数据来自6084头正常的经产母牛，这些母牛在一个商业人工授精项目中，按照上午/下午的日程安排，经肉眼观察处于发情期。经直肠检查确认发情并在触诊后进行授精的母牛比例为96.2%。其余母牛未进行授精，这些母牛的150天未返情率为86.9%。在确认发情的母牛中，触诊时准备好配种的母牛比例为96.1%，这些母牛（43.9%）的150天未返情率与发情和授精时间被认为不正确的母牛（26.7%）不同。这些结果表明，通过直肠检查生殖器官作为发情视觉检测的有效补充，可提高奶牛群的繁殖效率。
