Gestational age:Time:Pt:^Fetus:Qn:US+Estimated from BPD.Tokyo 1986
gestational age:time:pt:^fetus:qn:us+estimated from bpd.tokyo 1986
Gestational age estimated from Biparietal diameter on US by Tokyo 1986 method
gestational age estimated from biparietal diameter on us by tokyo 1986 method