Gestational age:Time:Pt:^Fetus:Qn:US+Estimated from OFD.Hansmann 1985
gestational age:time:pt:^fetus:qn:us+estimated from ofd.hansmann 1985
Gestational age:Time:Pt:^Fetus:Qn:US+Estimated from OFD.Hansmann 1985
gestational age:time:pt:^fetus:qn:us+estimated from ofd.hansmann 1985