Gestational age:Time:Pt:^Fetus:Qn:US+Estimated from HC.Hadlock 1982
gestational age:time:pt:^fetus:qn:us+estimated from hc.hadlock 1982
Gestational age:Time:To identify measures at a point in time:^Fetus:Quantitative:Ultrasound+Estimated from Head circumference.Hadlock 1982
gestational age:time:to identify measures at a point in time:^fetus:quantitative:ultrasound+estimated from head circumference.hadlock 1982