Gestational age:Time:Pt:^Fetus:Qn:Estimated from FL.Merz 1988
gestational age:time:pt:^fetus:qn:estimated from fl.merz 1988
Gestational age:Time:To identify measures at a point in time:^Fetus:Quantitative:Estimated from Femur length.Merz 1988
gestational age:time:to identify measures at a point in time:^fetus:quantitative:estimated from femur length.merz 1988