Pregnancy changes haemodynamics dramatically. Our aim is to assess diastolic function in normal healthy pregnant mothers, and changes sin diastolic function in each trimsters and in post–partum period. MATERIALS AND METHODS: our study was planned as prospective in nature, assessing diastolic functions on 40 asymptomatic, healthy antenatal pregnant women who came to our cardiology outpatient department for routine checkup from the period of March 2018 to April 2019.. RESULTS: E wave –peak transmitral velocity in early diastole, decreased significantly during third trimester and postpartum. No much variation in I trimester. A wave – the atrial contraction wave increased in second trimester and decreased in third trimester and postpartum.So E/A ratio reduced progressively by the duration of pregnancy as pregnancy advanced. Em peak myocardial velocity of early diastole by ( TDI) increased during second trimester followed by decrease in in third trimester and postpartum . Am – peak myocardial velocity of atrial contraction increased progressively as pregnancy advances.So the net result was reduction in both E/Em ,Em/Am ratios through the pregnancy.