FGR is normally used to refer to small fetuses with higher risk for fetal inutero deterioration, stillbirth and overall poorer perinatal outcome as compared with normally grown fetuses. They are associated with Doppler signs suggesting hemodynamic redistribution as a reflection of fetal adaptation to under nutrition /hypoxia, histological and biochemical signs of placental disease and a higher risk of preeclampsia. The term SGA has been used to differentiate a subgroup of small fetuses that do not present the changes described above. While the concepts of FGR and SGA may be clear, distinction of ‘True FGR’ in clinical practice can be challenging.

                    Population based series show that prenatal identification of SGA babies’ results in a reduction of adverse perinatal outcome and stillbirth. However, most SGA babies remain unnoticed until birth, even when routine third trimester ultrasound is performed. In late SGA fetuses, abnormal CPR is present before delivery in 20-25% of the cases. We propose that low fetal CPR is associated with adverse perinatal outcome. This study aims to evaluate the Cerebro Placental Ratio, which is the ratio of Pulsatality Index of fetal middle cerebral and Umbilical Artery, in normal and high-risk pregnancies during 28 – 36 weeks of gestation and compare the fetal and neonatal outcome.