Diameter:Len:Pt:Gestational sac:Qn:US.estimated from Rempen 1991
diameter:len:pt:gestational sac:qn:us.estimated from rempen 1991
Gestational sac Diameter estimated from gestational age by method of Rempen 1991 (US)
gestational sac diameter estimated from gestational age by method of rempen 1991 (us)