application of beta adrenoceptor blockers to minimize the occurrence of retained placenta in dairy cows

ABSTRACT

This investigation was done to show the effect of beta 2-adrenoceptor blocker on the expulsion of the placenta in dairy cows. Twenty-eight cows were injected with beta 2-blocker carazolol [Suacron] immediately following parturition. Sixteen cows were injected with saline and served as control. Carazolol significantly reduced incidence of retained placenta [X 2 = 4.62]. Meanwhile, the placenta was dropped in a significantly shorter time [4.67 vis 7.04 hours] in treated and control cows, respectively. Carazolol was useful to reduce the incidence of retained placenta when prophylactically administered after parturition