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International Journal of Recent Trends in Science and Technology, ISSN 2277-2812 E-ISSN: 2249-8109
Volume 9, Issue 3, January 2014 pp 453-456
Comparative Study of Various Methods of Fetal Weight Estimation at Term Pregnancy
Dilip Kathiriya#,*,Yamini Patil**, R.P.Patange***
*Resident, **Associate Professor, ***Professor, Department of OBGY, KIMSDU, Karad, Maharashtra, INDIA.
Academic Editor : Dr. Aher K. R.
Objective: To assess and compare the accuracy of clinical and sonographic fetal weight estimation in predicting birth weight at term pregnancy, patients who were in latent or in active phase of labour. Design: prospective cross sectional study involving 500 full term, singleton pregnancies with cephalic presentation. The study was conducted in a tertiary care centre at karad, Maharashtra, India. Method: In a prospective study of 500 women, fetal weight was estimated by both clinical formulas (insler and Johnson formula). An ultrasonography was then performed by sonologist to estimate the fetal parameters (AC AND FL).The fetal weight was calculated by using standard Hadlock table (Hadlock formula using AC and FL), Expected baby weight according to clinical formula and sonography was compared with actual birth weight after delivery. Accuracy of estimates was assessed in terms of percentage and grams. The chi-square test was used for comparison. Results: The means percentage of error was 248.2 Gms and 13.48 percentages for insler EFW,265.2 Gms and 14.36 percentages for Hadlock EFW, 573 gms and 31 percentages for Johnson formula. The proportion of the EFW which were within 10 percentage of birth weight was 66.6 percentage for insler formula, 70 percentage for Hadlock formula and 22.4 percentage for Johnson formula. Insler and Hadlock EFW were correlated well with actual birth weight, as compare to Johnson formula that had a highest error in prediction of birth weight. Conclusion: fetal weight estimation using measuring tape (insler formula EFW) is just as accurate as ultra sound estimates (HADLOCK FORMULA BY USING AC AND FL) for prediction of birth weight. The present study indicates that, among full term singleton cephalic pregnancies, fetal weight estimation using measuring tape is just as accurate as ultra sound estimates for prediction of actual birth weight. This simple clinical method for fetal weight estimation is easy to perform and teach. This is an inexpensive and practical tool for predicting birth weight, especially for less experienced examiner.