[Radiotelemetric studies of uterine motility in cows with placental retention].

Uterine motility of 21 cows with retention of the placenta from delivery to 120 D was studied by the radiotelemetric method. Higher uterine motility until 48 D was established in cows with retention of the placenta as compared to cows with a normal third stage of delivery. The mean values of total uterine motility frequency and amplitude of contractions are presented in tables and graphs. Estradiol 17-beta content in cow blood plasma until the 40 D post delivery was higher in cows with retention of the placenta. Bending and folding of uterine horns proved to be the reason for retention of the placenta in 6 cows.