Estimation of fetal weight: a comparison of clinical and sonographic methods

AbstractFetal weight estimation is important in the management of labour and delivery. This study aimed to compare the accuracy of the clinical and ultrasound methods of fetal weight estimation. This was a prospective study involving 110 term cephalic singleton pregnancies delivered within 24 hours of clinical fetal weight estimation using Johnson’s and Dare’s formulae and ultrasound estimation at a Tertiary hospital in Abakaliki, Nigeria. The data were analysed with Stata 11 software. The sonographic estimation within 10% of the actual birth weight (ABW) of 68.2% was significantly greater than the accuracy of Johnson’s (23.6%), Dare’s (26.4%), and the combined clinical formulae (27.1%). The clinical methods overestimated the fetal weight. Both methods showed a positive correlation with the ABW. In conclusion, the sonographic method had a better accuracy than the clinical methods. However, fetal weight overestimation by clinical methods warrants their usefulness in resource-poor settings such that the cli...