Diameter:Len:Pt:Gestational sac:Qn:US.estimated from Rempen 1991
diameter:len:pt:gestational sac:qn:us.estimated from rempen 1991
Diameter:Length:To identify measures at a point in time:Gestational sac:Quantitative:Ultrasound.estimated from Rempen 1991
diameter:length:to identify measures at a point in time:gestational sac:quantitative:ultrasound.estimated from rempen 1991