Diameter.biparietal:Prctl:Pt:Head^Fetus:Qn:Per estimated gestational age
diameter.biparietal:prctl:pt:head^fetus:qn:per estimated gestational age
Diameter.biparietal:Prctl:Pt:Head^Fetus:Qn:Per estimated gestational age
diameter.biparietal:prctl:pt:head^fetus:qn:per estimated gestational age