Effects of Oxytocin and Epinephrine on Uterine Motility in the Bovine

Abstract

The effect of oxytocin, epinephrine and epinephrine followed by oxytocin on uterine motility in the cow was detd. by the balloon technic both in vivo and in vitro. Oxytocin caused increased activity at all stages of the estrous cycle. Epinephrine caused a period of reduced activity and tone, usually preceded by one large contraction. Epinephrine given before oxytocin partially or completely inhibited the increased activity due to oxytocin. The in vitro results agreed with the in vivo results.