Volume:Vol:Pt:Yolk sac^Fetus:Qn:US.measured
volume:vol:pt:yolk sac^fetus:qn:us.measured
Volume:Volume:To identify measures at a point in time:Yolk sac^Fetus:Quantitative:Ultrasound.measured
volume:volume:to identify measures at a point in time:yolk sac^fetus:quantitative:ultrasound.measured