Gestational age:Time:Pt:^Fetus:Qn:US+Estimated from HL.Osaka 1989
gestational age:time:pt:^fetus:qn:us+estimated from hl.osaka 1989
Gestational age estimated from Humerus length on US by Osaka 1989 method
gestational age estimated from humerus length on us by osaka 1989 method