A Comparative Study of Fetal Weight Estimation at Term by Clinical Method and Ultrasonography

Background: Sonographic fetal weight estimation is an important component of antenatal care. It was found to be more reliable method to establish fetal weight at term and more consistent in various period of gestations. Aim of study: to compare clinical and sonographic methods for assessment of fetal weight regarding sensitivity, specificity and accuracy. Subjects and Methods: The study recruited 100 women scheduled for delivery from ante-natal care clinic with 38 weeks or more of gestation. Fetal weight was assed clinically and by ultrasound. Both techniques were compared and analyzed. Results: Ultrasound assessment of fetal weight showed better performance than the clinical method regarding absolute errors and error percentages. Ultrasound assessment showed better sensitivity and specificity in detecting fetal weight > 3500 gm. Moreover, it showed less bias on Bland–Altman plot analysis. Conclusions: Ultrasound assessment of fetal weight is safe, reliable and sensitive method of fetal weight estimation.

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A Comparative Study of Fetal Weight Estimation Using Ultrasound and Johnson’s Formula and its Correlation with Actual Birth Weight

International Journal of Scientific Research ◽

10.15373/22778179/feb2014/127 ◽

2012 ◽

Vol 3 (2) ◽

pp. 389-390

Author(s):

Dr.Kavitha.b Dr.Kavitha.b ◽

◽

Dr.G.C.Prabhakar Dr.G.C.Prabhakar ◽

Dr. Shaivalini.k Dr. Shaivalini.k ◽

Dr.Suprada.k Dr.Suprada.k

Keyword(s):

Birth Weight ◽

Comparative Study ◽

Fetal Weight ◽

Weight Estimation ◽

Fetal Weight Estimation

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Clinical versus ultrasonographic fetal weight estimation and its correlation with actual birth weight

International Journal of Reproduction Contraception Obstetrics and Gynecology ◽

10.18203/2320-1770.ijrcog20190275 ◽

2019 ◽

Vol 8 (2) ◽

pp. 503

Author(s):

Ashwini Ingale ◽

Shweta Avinash Khade ◽

Sneha Shirodkar

Keyword(s):

Birth Weight ◽

Tertiary Care ◽

Mean Absolute Percentage Error ◽

Fetal Weight ◽

Percentage Error ◽

Care Hospital ◽

Weight Estimation ◽

Clinical Method ◽

Fetal Weight Estimation ◽

Absolute Percentage Error

Background: This is a prospective study was conducted at Obstetrics and Gynecology department, tertiary care Hospital, to compare the accuracy of clinical and ultrasonographic estimation of fetal weight at term with actual birth weight.Methods: The present study is a prospective comparative study of fetal weight estimation in Antenatal women with term gestation (37week to 42week of gestation) singleton pregnancy with vertex presentation, who had gestational age confirmed by dates and ultrasound scanning of< 22weeks admitted in tertiary care center from March 2016 to November 2016. Patients with Polyhydramnios, oligohydramnios, Antepartum hemorrhage, Congenital anomalies of fetus, Obese (Body mass index >30 kilogram/meter2) are excluded from the study. Estimation of fetal weight is done by clinical method and ultrasonography. Birth weight after delivery was recorded in grams by electronic weighing machine and tabulated.Results: Clinical as well as ultrasonography estimates observed to be strongly correlate with actual birth weight. Both the methods had more sensitivity in birth weight range 2500-4000gm than <2500g and >4000g. The overall mean absolute percentage error of the clinical method (7.2±7.7) was smaller than that of the sonographic method (16.2±11.1). In low birth-weight (<2,500g) group, mean absolute percentage error was 9.0±11.3 with USG and same with clinical was 11.7±9.0. No statistically significant difference was observed.Conclusions: The present study concludes that clinical estimation of birth-weight is as accurate as routine ultrasonographic estimation.Clinical palpation should be considered as diagnostic tool for FWE and is equally reliable even when done by trained medical person. It is cheap and easy to teach. The need is to practically apply this method in obstetrics and guide the management decisions.

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Comparative Study of Various Methods of Fetal Weight Estimation in Term Pregnancy

Journal of SAFOG with DVD ◽

10.5005/jp-journals-10006-1213 ◽

2013 ◽

Vol 5 (1) ◽

pp. 22-25 ◽

Cited By ~ 4

Author(s):

Partha Mukherjee ◽

Sebanti Goswami ◽

Anupama Kumari

Keyword(s):

Birth Weight ◽

Standard Deviation ◽

Comparative Study ◽

Fetal Weight ◽

Average Error ◽

Weight Estimation ◽

Term Pregnancy ◽

Weight Category ◽

Medical College ◽

Fetal Weight Estimation

ABSTRACT Objective The goal of this study was to evaluate the various methods of estimating fetal weight in term pregnancy and to determine their relative accuracy in predicting the same in different weight categories. Materials and methods The study was conducted at Department of Obstetrics and Gynecology, Medical College and Hospital, Kolkata from 1st July 2009 to 30th June 2010. It was a prospective cohort type of study covering 500 pregnant women at term. Parameters studied (a) average error (gm) in different birth weight categories, (b) standard deviation of prediction error in each birth weight category. Results Ultrasonography was found to have least standard deviation closely followed by the two clinical methods proposed by Johnson and Dare. The average positive predictive value of different methods in our study was 42.2, 70.9, 80.5 and 76% for Dawn's, Johnson's, Dare's formulas and USG respectively. Conclusion Easily measurable obstetric parameters with simple instruments requiring minimal manpower training are equally accurate as USG in predicting fetal weight. How to cite this article Kumari A, Goswami S, Mukherjee P. Comparative Study of Various Methods of Fetal Weight Estimation in Term Pregnancy. J South Asian Feder Obst Gynae 2013;5(1):22-25.

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Assessment of accuracy of two dimensions ultrasonography of fetal thigh soft tissue versus Hadlock's formula in estimation of fetal weight

QJM ◽

10.1093/qjmed/hcab115.023 ◽

2021 ◽

Vol 114 (Supplement_1) ◽

Author(s):

Mohamed Abdel Fattah Elsenity ◽

Mohamed Abdel Aziz El Sayed El Zeiny ◽

Marwa Radwan Abbass Shahin ◽

Adel Shafik Salah El-Din

Keyword(s):

Soft Tissue ◽

Comparative Study ◽

Pregnant Women ◽

Maternity Hospital ◽

Two Dimensions ◽

Fetal Weight ◽

Study Group ◽

Weight Estimation ◽

Fetal Weight Estimation ◽

Better Than

Abstract Objective The current study aims to compare between mid-thigh soft tissue formula and modified mid-thigh soft tissue formula with Hadlock formula in estimation of fetal weight. Materials and methods Two hundred full term pregnant women attending Ain Shams Maternity Hospital in the period from April 2018 and April 2019 were included in this comparative study. Whole study group (200 women) had 2D ultrasonography using Hadlock's formula, thigh soft tissue formula and Modified thigh soft tissue formula. Results In our current study Hadlock's formula was better than thigh soft tissue and modified thigh soft tissue formula in estimation of fetal weight. Conclusions Fetal mid-thigh SST is a simple, useful, and easily applicable parameter for fetal weight estimation.

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Clinical Estimation of Fetal Weight with Reference to Johnson’s Formula: An Alternative Solution Adjacent to Sonographic Estimation of Fetal Weight

Kathmandu University Medical Journal ◽

10.3126/kumj.v18i2.33219 ◽

2020 ◽

Vol 18 (2) ◽

pp. 7-12

Author(s):

A. Dongol ◽

R. Bastakoti ◽

N. Pradhan ◽

N. Sharma

Keyword(s):

Birth Weight ◽

Confidence Interval ◽

Pregnant Women ◽

Cost Effective ◽

Fetal Weight ◽

University Hospital ◽

P Value ◽

Weight Estimation ◽

Clinical Method ◽

Fetal Weight Estimation

Background Fetal weight estimation plays a significant role in the antenatal management of high risk pregnancies. It is also an important parameter for predicting the neonatal outcome and informs decision for the mode of intra-partum management of the pregnant women. Among the various methods of prenatal fetal weight estimation, the most commonly used are clinical estimation and sonography. Objective The objective of this study was to compare the accuracy of clinical estimation of fetal weight using Johnson’s formula and sonographic estimation with actual birth weight. Method This prospective study was conducted at Dhulikhel Hospital, Kathmandu University Hospital, from January 2017 to August 2018. The study included 335 pregnant women at term gestation. Result The estimation of fetal weight at term pregnancy using Johnson’s formula is as effective as sonological method. For clinical method, the fetal weight falls between 95 gm and 183 gm at 95% confidence interval. With respect to ultrasound method, the fetal weight is found to be 45 gm and 132 gm at 95% confidence interval at p value < 0.001. Conclusion Clinical estimation of fetal weight can be utilized as an alternative to sonological estimation in the management of labor and delivery. Johnson’s formula is a simple, easy, cost-effective, and universally applicable method to predict fetal birth weight and can be used anywhere by doctors, nurses, midwives and paramedics in centers where ultrasound is not available.

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Clinical and sonographic estimation of fetal weight and correlation with the birth weight: a research article

International Journal of Reproduction Contraception Obstetrics and Gynecology ◽

10.18203/2320-1770.ijrcog20193781 ◽

2019 ◽

Vol 8 (9) ◽

pp. 3595

Author(s):

Alvencia Vaz ◽

Aheibam Bidya Devi ◽

Naorem Nabakishore Singh ◽

Wahengbam Jatishwor Singh ◽

Laiphrakpam Ranjit Singh ◽

...

Keyword(s):

Health Care ◽

Developing Countries ◽

Birth Weight ◽

Fetal Weight ◽

Accurate Estimation ◽

Weight Estimation ◽

Clinical Method ◽

Ultrasound Method ◽

Fetal Weight Estimation ◽

Method R

Background: Accurate estimation of fetal weight is of paramount importance in the management of labour and childbirth. In developing countries including India, estimation of fetal weight by clinical method is important as ultrasound is not available in all health care settings. In view of this, the present study was conducted to estimate the fetal weight assessed by clinical and ultrasound method and correlating with the birth weight.Methods: A cross-sectional study was conducted to estimate fetal weight clinically by using Johnson’s formula and sonographically based on Hadlock’s formula in the Department of Obstetrics and Gynecology in collaboration with Department of Radiodiagnosis, Regional Institute of Medical Sciences, Imphal from October 2016 to March 2018. The study consisted of 525 pregnant women between 37 to 40 weeks of gestation in whom delivery was anticipated within one week of fetal weight estimation by clinical and ultrasound method and correlating it with the baby’s birth weight measured immediately after delivery. Analysis was done using Chi-square and Student’s t-test and p-value of <0.05 was taken as significant.Results: Both methods showed positive correlation with birth weight but clinical method (r=0.925) had stronger correlation compared with ultrasound method (r=0.508).Conclusions: Fetal weight estimation using Johnson’s formula had stronger correlation with the birth weight than ultrasound method and hence, useful for developing countries and all health care workers may be sensitized about the method.

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