Gestational age:Time:Pt:^Fetus:Qn:US+Estimated from TCD.Hill 1990
gestational age:time:pt:^fetus:qn:us+estimated from tcd.hill 1990
Gestational age estimated from Transverse cerebral diameter on US by Hill 1990 method
gestational age estimated from transverse cerebral diameter on us by hill 1990 method