Effect of Methylergometrine Maleate on Uterine Involution in Postpartum Cows

Eighteen Postpartum Holstein Friesian (HF) crossbred cows aged between 2nd and 5th lactations were selected and randomly divided into 2 experimental groups viz., group I and II (control). On day 2 Postpartum group I and II cows were treated with an intramuscular injection of 5 mg methyl ergometrine maleate and 5 ml normal saline, respectively. The cervical involution progressed rapidly and on day 30 postpartum, the cervix reached the pelvic cavity in group I. The cervical involution in control cows was slower than treatment group. In both the groups after day 20 postpartum, ridges on the uterus were not palpable, uterine contour was palpable and uterus was retractable rectally. Ultrasonography of cervix revealed that the cervical diameter was higher on day 30 postpartum in control group when compared to treatment group. On day 2 postpartum, the diameter of the uterine body measured by ultrasonography did not vary among treatment and control groups. In group I (methyl ergometrine maleate), there was a rapid uterine involution from day 2 to 30 postpartum compared with the control group.