Calving Ease Direct has other things figured in then BW. See the thread about BW or Shape. While BW is used to calculate it (with most breeds) the reported calving ease as number and difficulty of pulls is most of the number. One thing to watch for is the accuracy of the EPD and you hsould check back multiple generations to see if it is one of those matings where they just average the parents CED and use that(low accuracy). Check the ancestors for their CED and accuracy.