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Background: Primary purpose of foetal surveillance is to detect foetal hypoxia and acidosis which are common causes of foetal and perinatal mortality. Significant Doppler changes occur with reduction in foetal growth at a time when other foetal tests are still normal. Material & methods: During the study, 100 women with high risk pregnancy were selected and a prospective randomised study was carried out. NST was done in every patient and repeat NST was done according to high risk factors present. USG for foetal assessment, liquor adequacy, and Doppler analysis of foetal arteries was carried out by Duplex scanner. Results: Most common high risk factor in present study is PIH (60%) followed by post-dated pregnancy (21%). 23% women had abnormal Doppler and 45% had non-reactive NST. 49% patients showed both foetal surveillance tests normal and 21% showed both abnormal.