Gestational age:Time:Pt:^Fetus:Qn:US+Estimated from HC.Merz 1988
gestational age:time:pt:^fetus:qn:us+estimated from hc.merz 1988
Gestational age:Time:Pt:^Fetus:Qn:US+Estimated from HC.Merz 1988
gestational age:time:pt:^fetus:qn:us+estimated from hc.merz 1988