Birth and Calving Ease

Birth weight. The birth weight evaluation includes individual weights on embryo transfer calves out of registered Angus recipient females, provided any other NCE requirements for edited data are met. The birth weight model includes direct and maternal genetic effects
Calving ease. Heifer calving ease EPDs were calculated using a multi-trait animal model including birth weight and calving score data. The result is a heifer calving ease direct and heifer calving ease maternal EPD, as defined below.

Calving Ease Direct (CED): Calving Ease Direct EPD is expressed as percentage of unassisted births, with a higher value indicating greater calving ease in first-calf heifers. It predicts the average difference in ease with which a sire’s calves will be born when he is bred to first-calf heifers.
Calving Ease Maternal (CEM): Calving Ease Maternal EPD is expressed in percentage unassisted births with a higher value indicating greater calving ease in first-calf daughters. It predicts the average ease with which a sire’s daughters will calve as first calf heifers when compared to daughters of other sires.

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