The newest genetic measurement is DPR or Daughter Pregnancy Rate.   It is calculated by measure of the calving intervals after a cow has her second (and later) calvings.   Keep in mind the USDA data set only uses the first five lactations, so there would only be three "calving intervals" measured, and most weight will be on that interval between second and first lactation, with a default value of 250 days open assigned a cow who is culled in lactation.   (At 2.4 lactations per cow national average, only half of DHIA cows would have two measured and then a third default value calving interval.    The other half would have only one measured calving interval at best).