Akw. Tong et al., CALVING AND WEANING PERFORMANCE OF CALVES FROM HEIFERS BRED TO EASY CALVING SIRES, Canadian journal of animal science, 74(2), 1994, pp. 375-377
In a calving ease comparison involving 106 calves born to first calf h
eifers, calves sired by Red Angus bulls were heavier at birth and requ
ired mom calving assistance than Corriente-sired calves. However, the
easier calving Corriente-sired calves experienced equivalent death los
s and were significantly lighter at 3, 5 and 7 mo of age.