Abstract
Objective: To determine the correlation between ultrasono-graphically estimated fetal weight and actual birth weight in females presenting in a tertiary care hospital.
 Study Design: Comparative cross-sectional study.
 Place and Duration of Study: Department of Radiology Peripheral Nervous System, PNS Shifa Hospital Karachi Pakistan, from Sep 2018 to Jan 2019.
 Methodology: Fifty pregnant females were enrolled after meeting the inclusion criteria. A consultant radiologist calculated fetal weight by measuring biparietal diameter (BPD), head circumference (HC), femur length (FL) and abdominal circumference (AC) with the help of an ultrasound (USG) machine having a Hadlock 3 weight estimation algorithm. A paediatrician noted actual birth weight with a weighing scale after delivery.
 Results: The mean fetal weight on ultrasound was 2.52±0.34kg. The mean actual birth weight of the babies was 2.66±0.42 kg. A strong positive correlation (r=0.575, p<0.05) was found between ultrasonographic fetal weight estimation and actual birth weight.
 Conclusion: Ultrasonography is an accurate, safe, cost-effective and easy available imaging modality for fetal weight estimation.
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