Conception and Embryonic Development in the Beef Female

Authors

Ralph R. Maurer, U.S. Meat Animal Research Center
Sherrill E. Echternkamp, U.S. Meat Animal Research Center
William F. Pope, U.S. Meat Animal Research Center

Date of this Version

1982

Document Type

Article

Comments

Published in Beef Research Program Progress Report (1982) No. 1: 17-19

Abstract

Reproduction is an important economic trait in beef cattle production. The average percent calf crop for the United States has been estimated between 80 to 85%. Approximately 60% of the reduction in calf crop can be attributed to fertilization failure and embryonic death. We conducted several studies to determine at what stage of the reproductive cycle losses were incurred in normal reproducing cows and heifers and in cows and heifers that failed to reproduce. In addition, we measured hormone levels in normal range cows and heifers and used techniques like embryo transfer and culture to study the development of the embryo.