Fig. 1From: Three-dimensional power Doppler ultrasound evaluation of placental blood flow in normal monochorionic diamniotic twin pregnanciesSchematic representation of three-dimensional power Doppler of each fetal placental volume in twin pregnancy. The sphere (yellow sphere frame) included placental tissue between the chorionic and basal plate close to each fetal (fetus a and fetus b) umbilical cord insertion siteBack to article page