Fetal Doppler in monochorionic pregnancies complicated by Twin-to-Twin Transfusion Syndrome and selective In Utero Growth Restriction

The Doppler anomalies observed in the smaller twin reflected increased placental blood flow resistance, presumably due to abnormal feto-fetal transfusion in TTTS and to unequal placental sharing in sIUGR. Early hemodynamic changes suggestive of cardiac overload in the recipient twin may help to differentiate TTTS and sIUGR.