Background &Method: The aim of this study is to determine the accuracy of uterine artery, Umbilical artery & Middle cerebral artery Doppler flow velocity waveform in detecting I.U.G.R. in high risk pregnancies.A total of fifty cases were included in the study. These comprised some cases of pregnancy associated with maternal disorders thereby comprising the obstetric high risk group. These were selected from the antenatal clinics as well as the maternity wards.