Animal Science Department


Date of this Version



2015 Nebraska Beef Cattle Report, University of Nebraska—Lincoln Extension, MP101.


Copyright © 2015 University of Nebraska.


Eighteen breeds were utilized to estimate genetic parameters for birth weight and calving difficulty on first-parity females. Birth weight and calving difficulty were moderately heritable allowing for genetic selection to decrease calving difficulty. Genetic correlation estimates were positive between direct effects for birth weight and calving difficulty. This work will serve as the foundation for estimating across-breed EPD for calving difficulty in the U.S.