Gestational age:Time:Pt:^Fetus:Qn:US+Estimated from BPD.Rempen 1991
gestational age:time:pt:^fetus:qn:us+estimated from bpd.rempen 1991
Gestational age estimated from Biparietal diameter on US by Rempen 1991 method
gestational age estimated from biparietal diameter on us by rempen 1991 method