EFFECT OF THE GONADOTROPIC SUBSTANCE OF PREGNANT MARE’S SERUM ON THE BLOOD PLASMA-ASCORBIC ACID OF THE BOVINE

Abstract

The inj. of 2250 R.U. of the gonadotrophic hormone of P.M.S. resulted in a decrease in the venous blood plasma ascorbic acid of the bull from 42-67% during the 1st 24-hr, period. The inj. of 1000 to 2250 R.U. of gonadotrophin in the cow caused decreases of from 20-50% during the first 24 hrs. The recovery of pre-inj. levels of plasma ascorbic acid required 8-10 days in the cow and longer in the bull unless extraneous vit. C was added. The daily inj. of ascorbic acid prior to and following gonadotrophin inj. decreased the fall in plasma ascorbic acid following hormone adm.