Background: Intrauterine growth restriction (IUGR) is typically characterized as a condition affecting neonates whose birth weight falls below the 10th percentile. Hence; the present study was conducted for assessing role of Ultrasound in Diagnosis of Intrauterine Growth Restriction. Materials & methods: A total of 100 pregnancies that had been diagnosed clinically and ultrasonographically as intrauterine growth restriction (IUGR) were enrolled. All patients in the study underwent uniform antenatal assessment protocol and Doppler ultrasound studies. Ultrasound was done in all the patients. On USG, head circumference (HC) and abdominal circumference (AC) was assessed. All the results were recorded in Microsoft excel sheet and were subjected to statistical analysis using SPSS software. Results: The research involved a cohort of 100 patients diagnosed with intrauterine growth restriction (IUGR) stemming from various etiologies. These patients were categorized into three distinct groups based on the underlying cause of IUGR: maternal factors (n=49), placental factors (n=15), and idiopathic origins (n=36). Analysis revealed no significant differences in gestational age as determined by last menstrual period (LMP) and ultrasound gestational age (U/S-GA) across the three groups. However, a notable difference in the degree of growth retardation was observed, with the placental group exhibiting significantly greater retardation compared to the other two groups. Furthermore, when evaluating the ultrasound parameters among the different study groups, significant findings were recorded. Conclusion: In regions lacking access to Doppler technology, clinical diagnosis, despite its limited specificity, serves as an effective screening method for intrauterine growth restriction (IUGR). Nevertheless, when ultrasound equipment is accessible, integrating clinical assessment with sonographic evaluation enhances detection rates and facilitates a more accurate diagnosis of IUGR.