The Effects of Breeding Maturity on Dystocia and Rebreeding of the Primiparous Beef Female

Authors

Matthew Stockton, University of Nebraska-LincolnFollow
Roger K. Wilson, University of Nebraska-LincolnFollow
Richard N. Funston, University of Nebraska-LincolnFollow

Date of this Version

2009

Comments

Published in 2009 Nebraska Beef Cattle Report (Lincoln, NE: December, 2008). Copyright © 2008 The Board of Regents of the University of Nebraska.

Abstract

Maturity Index (MI) was used in a Probit regression as an explanatory variable of dystocia, where dystocia was used in a Probit regression as an explanatory variable of rebreeding rates of primiparous cows from data collected on replacement heifers from the Gudmundsen Sandhills Laboratory. Dystocia was found to decrease from about 40% to 13% for heifers when the MI increased from 53 to 70, supporting the notion that maturity reduces the incidence of dystocia, resulting in an increase in the second pregnancy rate.