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 estimated from length of vertebra by method of Tokyo 1986 (US)
gestational age estimated from length of vertebra by method of tokyo 1986 (us)