EN
The examinations were carried out on 6 cows with retention of fetal membranes. Uterus mobility was examined by the balloon method before and after intramuscular injection of 50 mg propranolol hydrochloride (Uterotonic-Polfa) and 1 g cimetidine (Tagamet). It was found that propranolol hydrochloride and cimetidine improved uterus mobility: the amplitude, frequency and myometric tonus increased. A spontaneous expulsion of the afterbirth within 2.5 and 5.5 hours after injection of propranolol hydrochloride and cimetidine was noted in all six examined cows.