Gestational age:Time:Pt:^Fetus:Qn:US.estimated from length of vertebra.Tokyo 1986
gestational age:time:pt:^fetus:qn:us.estimated from length of vertebra.tokyo 1986
Gestational age:Time:Pt:^Fetus:Qn:US.estimated from length of vertebra.Tokyo 1986
gestational age:time:pt:^fetus:qn:us.estimated from length of vertebra.tokyo 1986