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Abstract
Objective: The aim of the study to compare the accuracy of ultra-sonographic intrapartum measurement of subcutaneous tissue/femur length ratio, and estimation fetal weight in predication large for gestational age fetuses. Study design: Cross sectional data were obtained from 162 pregnant women at time of planed delivery. Fetal weight was estimated for each fetus using the formulae of Hadlock and Shepard and subcutaneous tissue of thigh was measured and (SCT/FL). Result: Macrosomia was detected or recorded in 18 newborn (11.1%). Maternal parity between macrosomia and non macrosomia were similar (NS), there were difference in the (SCT, SCT/FL) ratio, also Hadlock and Shepard formulae (p<0.001). Sensitivity, specificity for (SCT, SCT/FL) ratio was 60.3%, 79.5%, 64.9%, 77.9% respectively. And sensitivity, of hadlock and shepard was 69.6%, 55.6%, and specificity was 100%. Conclusion: Sonographic examination of subcutaneous tissue to femur length ratio is weak parameter for diagnosis of macrosomia in but add to non-diabetic pregnancy and diabetic if used alone, Hadlock Formula is best formula for estimation of birth weight, and followed by shepard formula