Estimation of fetal weight is very important in preventing delivery complications and also in selecting delivery method. This is specially important in potential macrosomia, IUGR and also preterm labor. The objective of this study is to compare the accuracy of ultrasonic, clinical and mother, fetal weight estimation in pregnant women in Kerman. Materials and Methods: In this cross sectional study 246 women with singleton, term pregnancies admitted for cesarean section within the following week,

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... were studied. Estimation of fetal weight (EFW) was done using sonography and then by two obstetricians and one senior resident who were unaware of the other clinical and ultrasonic results. Mothers' estimation of their baby weight was also asked. Statistical analysis was done by paired T and Chi square tests. We also used ROC (Radar Operating Characteristics) curve to compare the accuracy of different tests. Results: Fetal birth weight was 3339±443 gr. In the 2500-4000 gr birth weight the sensitivity of predicting clinical birth weight was 11.8% with 99.6% specificity and for sonographic EFW was 12.6% with 92.1% specificity. Conclusion: Clinical estimation of birth weight in term pregnancies is as accurate as routine ultrasonic estimation obtained in the preceding week of delivery. Key words: Fetal weight, ultrasound, birth weight, Kerman 2-Assistant professor, department of obstetrics and gynecology, Kerman university of medical sciences. 3-Associate professor, department of obstetrics and gynecology, Kerman university of medical sciences. 4-Fellowship of epidemiology, Tehran university of medical sciences. 5-Resident of obstetrics and gynecology.