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SUPEROVULATION IN THE CALF

Summary.: The induction of superovulation was studied in thirteen calves 4 to 24 weeks of age. Multiple ovulations were induced by 2000 i.u. PMS followed by an intravenous injection of either NIH-LH or HCG. The ovulatory response was determined at laparotomy 48 to 64 hr after LH injection. Eleven of the calves showed 1 to 50 ovulation points. All levels of NIH-LH produced satisfactory ovulatory responses. Recovery and fertilization rates of eggs were low.