From: Pre-service ultrasonic and manual evaluation of the reproductive organs of dairy cows presumed to be in estrus
Types of physical sign of estrus
Overall [%] (n = 62)
Pregnant [%] (n = 18)
Non-pregnant [%] (n = 44)
Uterine turgidity
82.3
85
81
Palpable ovarian follicles
67.7
73.8
56
Open cervix
88.7
93.75
90