Gestational age:Time:Pt:^Fetus:Qn:US+Estimated from AC.Hadlock 1982
gestational age:time:pt:^fetus:qn:us+estimated from ac.hadlock 1982
Gestational age estimated from Abdominal circumference on US by Hadlock 1982 method
gestational age estimated from abdominal circumference on us by hadlock 1982 method