Femur length/Head circumference:LenRto:Pt:^Fetus:Qn:US.derived
femur length/head circumference:lenrto:pt:^fetus:qn:us.derived
Femur length/Head circumference:Length Ratio:To identify measures at a point in time:^Fetus:Quantitative:Ultrasound.derived
femur length/head circumference:length ratio:to identify measures at a point in time:^fetus:quantitative:ultrasound.derived