Gestational age:Time:Pt:^Fetus:Qn:US+Estimated from IOD.Trout 1994
gestational age:time:pt:^fetus:qn:us+estimated from iod.trout 1994
Gestational age estimated from Inter ocular distance on US by Trout 1994 method
gestational age estimated from inter ocular distance on us by trout 1994 method