Gestational age:Time:Pt:^Fetus:Qn:US+Estimated from IOD.Mayden 1982
gestational age:time:pt:^fetus:qn:us+estimated from iod.mayden 1982
Gestational age estimated from Inter ocular distance on US by Mayden 1982 method
gestational age estimated from inter ocular distance on us by mayden 1982 method