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EXCLUDING heifers with smaller pelvic sizes prior to breeding can help avoid traumatic deliveries, increased vet costs and, in severe cases, cow and/or calf mortality, as well as the often-hidden interruption to cow fertility. This can all ultimately improve the productivity and profitability of beef farms. Difficult calvings bring layers of economic loss for beef farmers and genetics play an important part in calving ease. Pelvic size in cattle is a highly heritable trait and selecting heifers that have a larger pelvic area can rapidly reduce calving problems and the associated costs by £6.50 per head. While most farmers would expect the biggest, heaviest heifers to have the largest pelvic areas, these animals can in fact have smaller pelvises compared to smaller heifers in the herd.