Skip to main content

Table 1 Most common estrus signs observed by dairy owners and approximate time to insemination

From: Pre-service ultrasonic and manual evaluation of the reproductive organs of dairy cows presumed to be in estrus

Estrus sign Overall (n = 62) Manually examined (n = 29) Ultrasound examined (n = 33) Pregnant (n = 18) Non-pregnant (n = 44)
Bellowing [%] 60.0 51.7 54.5 61.1 59.5
Mounting others [%] 66.7 48.3 69.7 77.8 64.2
Mucus vaginal discharge [%] 83.3 79.3 87.9 88.9 83.3
Estrus to AI [hrs] 13.3 ± 9.3 13.4 ± 9.7 12.1 ± 9.6 8.5 15.10