Resistivity index:VelRto:Pt:Umbilical artery.between fetus and placenta^Fetus:Qn:US.doppler
resistivity index:velrto:pt:umbilical artery.between fetus and placenta^fetus:qn:us.doppler
Fet Umb a fetus-plc RI DOP
fet umb a fetus-plc ri dop