Occipital frontal diameter:Len:Pt:Head^Fetus:Qn:US.estimated from ASUM 2000
occipital frontal diameter:len:pt:head^fetus:qn:us.estimated from asum 2000
Occipital frontal diameter:Length:To identify measures at a point in time:Head^Fetus:Quantitative:Ultrasound.estimated from ASUM 2000
occipital frontal diameter:length:to identify measures at a point in time:head^fetus:quantitative:ultrasound.estimated from asum 2000