ABSTRACT
Objective
The aim of this study was to compare the predictability of the Vintzileos’ formula with the Hadlock's formula in estimating the fetal weight nearest to the actual birth weight.
Methods
It was a prospective observational study conducted with 138 antenatal mothers with single viable fetus and no major congenital abnormalities. A two-dimensional ultrasound scan was performed between 38 and 40 weeks gestation, which measured the biparietal diameter (BPD), head circumference (HC), abdominal circumference (AC), femur length (FL) and thigh circumference (TC) at the level of midthigh, and incorporated them to estimate fetal weight using the Hadlock's and the Vintzileos’ formulae.
Results
For the majority of the study population (63.04%), the mean fetal weight estimated by the Vintzileos’ formula was nearer to the mean actual birth weight compared to the Hadlock's formula. There was strong correlation (Karl Pearson's correlation coefficient r = 0.98, p-value <0.05) between the sonologically estimated and the neonatal thigh circumference.
Conclusion
The results of this study show that the fetal thigh circumference, if incorporated with other standard biometric parameters in estimating fetal weight by ultrasound, improves the predictability of birth weight estimation, and can predict intrauterine growth restriction.
How to cite this article
Sanyal P, Ghosh TK, Dasgupta S, Karim R, Mukherjee A, Das A. Predictability of Fetal Birth Weight from Measurement of Fetal Thigh Circumference by Twodimensional Ultrasound: A Prospective Study. J South Asian Feder Obst Gynae 2012;4(1):35-38.