Methods to Synchronize Estrous Cycles of Postpartum Beef Cows with Melengestrol Acetate121Presented at the Managing Reproduction in Beef Cattle symposium as a part of the 2002 Midwest ASAS and ADSA Regional Meeting in Des Moines, IA in March 2002.2Contribution from the Missouri Agriculture Experiment Station. The authors gratefully acknowledge support from Select Sires, Inc., Pharmacia Animal Health, Merial, and USDA-NRI 00-35203-9715.