Correlation of Gestational age Assessed By L.M.P.,Third Trimester Ultrasound and Ballard’s Score with Actual Birth Weight at Delivery

Objectives  To study the correlation of third trimester ultrasound assessed gestational age and gestational age assessed by Ballard’s score  with birth weight  in patients admitted with labour pain Methodology A total number of 199 patients in labour, who knew their LMP and were having third trimester ultrasonography were recruited . Ultrasonography examination was carried out and assessed gestational age were recorded. After the delivery of the baby, the birth weight, APGAR score at 1min were noted. Postnatal gestational age assessments were derived from New Ballard Scoring System. Gestational age(GA) extrapolated from the standardised Ballard scoring chart Results . New Ballard’s Score had a sensitivity of 75.55%, specificity 33.76%, PPV 25%, NPV 82.5% and accuracy of 43.2%. Significant associations were found in between New Ballard’s Score (NBS) and Birth-weight and insignificant associations were found in between NBS, USG and APGAR Score . Conclusion Significant associations were found in between antenatal assessed GA, New Ballard’s Score (NBS) and Birth-weight and insignificant associations were found in between NBS, USG and APGAR Score  .