Background: IUGR is challenging because of the difficulties in reachinga definitive diagnosis of the cause and planning management. IUGR isassociated not only with a marked increased risk in perinatal mortalityand morbidity but also with long term outcome risks.Study objectives: 3DUS provides accurate volume measurements ofregular & irregular objects and can improved accuracy compared with2DUS methods. Doppler measurement of fetal blood flow has been wellknown as a very sensitive method for detection of IUGR.Patients and methods: To determine the value of abdominal 3DUS(through measuring: fetal BV, fetal Thi-vol and finding the ratio [bydividing brain / thigh volume] ), and Doppler US of DV(throughmeasuring; S/ Dratio, [PI] and [RI] ) for detection of fetal growth in highrisk pregnancy (pre-eclamptic or diabetic). In addition to assessment offetal outcome according to mode of termination, birth weight, APGARscores & neonatal ICU admission.Results: BV in the control group is ranging from 334.2 to 506.3 ml, witha mean of 419.3 ml and a median of 418.5 ml. In high risk group the fetalBV is ranging from 289.1 to 479.2 ml, with a mean of 377.7 ml and amedean of 375.1ml and the results are significant as P value < 0.05.ThVol in the control group is ranging from 76 to 135ml, with a mean of106.35ml and a median of 107.5ml. In high risk group the fetal ThVol isranging from 69.9 to 132ml, with a mean of 103.46ml and a median of105ml. In the control group the mean and SD for RI is 0.55±0.19while the mean and SD for PI is 0.64±0.22. In the high risk group themean and SD for RI is 0.57±0.18 while the mean and SD for PI is0.61±0.24 and P value is insignificant.Conclusion: the use of 3DUS to measure the fetal BV obtaining a highlysignificant correlation between the 2 groups. But neither thigh volumemeasurement, fetal brain/fetal thigh volume ratio, nor Ductus venosusdoppler obtained any significant correlation between the 2 groups.