The waveform of umbilical artery Doppler velocity is an informative parameter of perinatal outcomes independent of gestational age or the presence of oligohydramnios in IUGR patients. It is especially important to check the waveform of umbilical artery Doppler velocity in IUGR patients with preeclampsia and IUGR patients with FDIU history.

Conjoined twins are very rare and the mortality rate of the fetus is extremely high. Early prenatal diagnosis is crucial, as it provides the opportunity for the mother and father to help in recognizing the conjunction of the twins and to help medical team in defining the prognosis of conjoined twins. We present a case of thoraco-omphalopagus conjoined twins diagnosed by two-dimensional and threedimensional transabdominal sonography at 14 +2 weeks of gestation. We present a case of dicephalic thoraco-omphalopagus twins diagnosed in the early second trimester with transabdominal 2D sonography and 3D sonography.