Length.crown rump:Len:Pt:^Fetus:Qn:US.measured
length.crown rump:len:pt:^fetus:qn:us.measured
Length.crown rump:Length:To identify measures at a point in time:^Fetus:Quantitative:Ultrasound.measured
length.crown rump:length:to identify measures at a point in time:^fetus:quantitative:ultrasound.measured