Head circumference/Abdominal circumference:LenRto:Pt:^Fetus:Qn:US.derived
head circumference/abdominal circumference:lenrto:pt:^fetus:qn:us.derived
Head circumference/Abdominal circumference:LenRto:Pt:^Fetus:Qn:US.derived
head circumference/abdominal circumference:lenrto:pt:^fetus:qn:us.derived