Gestational age:Time:Pt:^Fetus:Qn:US+Estimated from TCD.Chitty 1994
gestational age:time:pt:^fetus:qn:us+estimated from tcd.chitty 1994
Gestational age:Time:Pt:^Fetus:Qn:US+Estimated from TCD.Chitty 1994
gestational age:time:pt:^fetus:qn:us+estimated from tcd.chitty 1994