A Comparative study of Fetal Weight estimation at term by clinical method and ultrasound method and after delivery
Journal Title: IJAR-Indian Journal of Applied Research - Year 2015, Vol 5, Issue 6
Abstract
Introduction: The aim of modern obstetrics is to achieve the best quality of life for both mother and her unborn child. Accurate estimation of fetal weight is of paramount importance in the management -of la bour and delivery1. Birth weight is an important predictive parameter of neonatal outcome and its prenatal estimation plays a significant role in comprehensive evaluation and management of high risk pregnancies. Accurate fetal weight estimation remains an elusive goal for obstetricians Aim: The aim of the study is to compare the accuracy of clinical (Johnson’s formula) and Ultrasonographic (Hadlock’s Method) estimations of fetal weight at term with actual birth weight within 15 minutes after delivery. Materials and Methods: A prospective observational study of 100 anti-natal women between 37-40 weeks of gestati-on al age with a single term pregnancy with no fetal anomalies. Estimated fetal weight was estimated by clinical method using Johnson’s formula and by ultrasound using Hadlock’s formula and compared with the actual birthweight. Result: By ultrasound Hadlock’s Method over estimation of birthweight was seen in 36% of cases and under estimation in 64% of cases. The correct weight was estimated with an error of 100gms in 16% of cases by Johnson’s formula and in 60 % of cases by ultrasound Hadlock’s method. Maximum error with Johnson’s formula was 600gms whereas with that of Hadlock’s method was 542gms.The difference between the ultrasound estimated weight and actual weight was not statistically significant (p=.41). Conclusion : Ultrasonographic fetal weight estimation was relatively superior than the clinical method in the -predic tion of birthweight. Jonhnson’s formula is also still valuable if it is assessed by the experienced obstetricians, in remote places where the facility of ultrasonography is not available
Authors and Affiliations
Dr. K. Annapurna, Dr. Ch. Rama, Dr. C. Ramamani
Keywords
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