Background/Objective: Doppler ultrasound of umbilical vessels is a method of evaluating fetoplacental blood flow which is very important in high risk pregnancies including pregnancy induced hypertension and may predict both the duration of maternal hospitalization and fetal mortality rates in IUGR. In this study, Doppler indices of blood flow through the umbilical artery were measured in patients with pregnancy induced hypertension."nPatients and Methods: This study was a cross-sectional study which was carried out on 101 preg-nant women: 35 patients with pregnancy induced hypertension were in the case group that had no symptoms or signs of pre-eclampsia, eclampsia or diabetes melitus. 61 normal pregnant women were as the control group. All the patients were studied in their third trimester of pregnancy. Doppler ultrasound of the umbilical artery was performed for both the case and the control groups. Peak Systolic Velocity (PSV), End Diastolic Velocity (EDV) and mean velocity were measured. The Resistive Index (RI), Pulsatility Index (PI) and Systolic to diastolic ratio (S/D ratio) were calculated. The statistical analysis was performed on the obtained recorded data, using SPSS software."nResults: The calculated mean values of spectral Doppler indices in the case group were: 0.77 for RI; 1.39 for PI and 4.88 for S/D ratio while in the control group they were calculated as 0.64, 1.08 and 2.97, respectively. Altogether, comparison of the mean values of the mentioned indices revealed a significant difference between the two groups (P<0.01). The case group was significantly rated higher in terms of the above mentioned indices."nConclusion: In patients with pregnancy induced hypertension without any complications (such as pre-eclampsia or eclampsia) or without any other risk factors (such as diabetes mellitus and IUGR), Doppler ultrasound should be used for evaluating the degree of fetoplacental blood flow in order to decrease the risk of pregnancy complications.