1. American Angus Association 2004. Angus trait heritabilities and genetic correlations. Available: http://www.angus.org/sireeval/heritabilities.html Accessed Mar. 13, 2004.
2. American Angus Association 2003. AHIR average adjusted weights and measurements by year. Available: http://www.angus.org/sireeval/ahir_ave.html Accessed Dec. 23, 2003.
3. An analysis of reproductive traits in beef cattle;Dearborn;J. Anim. Sci.,1973
4. Additive genetic parameter estimates for heifer pregnancy and subsequent reproduction in Angus females;Doyle;J. Anim. Sci.,2000
5. Genetic parameter estimates for heifer pregnancy rate and subsequent rebreeding rate in Angus cattle;Doyle;J. Anim. Sci.,1996