Gestational age:Time:Pt:^Fetus:Qn:US.composite.estimated
gestational age:time:pt:^fetus:qn:us.composite.estimated
Gestational age:Time:To identify measures at a point in time:^Fetus:Quantitative:Ultrasound.composite.estimated
gestational age:time:to identify measures at a point in time:^fetus:quantitative:ultrasound.composite.estimated