Introduction: The use of Ambulatory blood pressure monitoring may help in accurate assessment of blood pressure patterns throughout pregnancy and early detection of pre eclampsia. Objective: To determine whether Ambulatory BP monitoring is comparable to conventional BP measurements in pregnancy. Methods: A prospective study was conducted in Department of OBG at JSS Hospital from July 2016- June 2017. 40 women, 18–35 years of age with no risk factors like multiple pregnancy, molar pregnancy, chronic hypertension, renal, cardiac, connective tissue disorders, diabetes and thyroid disorders were recruited. Office BP monitoring and 24 hour Ambulatory BP measurement using Welch Allyn 6100P Ambulatory BP monitor was done. The BP was recorded at 8–14 weeks, 16–20 weeks, 22–28 weeks and 32–36 weeks. Results: The SPSS 21 software was used for statistical analysis. The mean ambulatory systolic and diastolic pressures did not show significant difference when compared to office BP. The night time ambulatory pressures when compared to office recordings also did not show significant changes. There was no night time dip in BP in majority of women. Conclusion: Ambulatory BP monitoring is an effective method, which may be used in high risk women, for early detection of hypertensive disorders in pregnancy.