Fetal weight estimation and prediction of fetal macrosomia in non-diabetic pregnant women

Objectives: To investigate the factors which might influence the sonographic fetal weight estimation (SFWE) accuracy. Methods: This prospective study was conducted among 949 singleton term pregnant women who delivered at a tertiary center, from January 2017 to December 2017. All participants’ maternal (i.e. parity, age, body mass index and gestational weight gain during pregnancy), fetal sonographic (i.e. fetal presentation, amniotic fluid index, localization of placenta and estimated fetal weight) and neonatal (birth weight and gender) characteristics were recorded. A p<0.05 was considered significant. Results: The mean absolute percent error (APE) values of SFWE was 8.2±6.5 percent, and overall failure ratio (APE >10%) was 33%. In failure group, primiparous woman and cephalic presentation fetus were significantly more common compared to accuracy group (55.9% vs.44.8%; p=0.001 and 98% vs. 95.2%; p=0.03, respectively). In contrast, the mean neonatal birth weight (NBW) value was significantly lower in failure group compared to success group (3250±565 gr vs. 3404±410 gr; p=0.001). The correlation between SFWE and NBW was linear, however negative, and significant (p=0.001). Logistic regression analysis revealed that primiparous woman, cephalic presentation fetus and <3300 gr NBW were independent risk factors for the SFWE failure (relative risks were 1.6, 2.8 and 2.4 respectively, p<0.05). Conclusion: SFWE has a high correlation with NBW, however it’s accuracy is still unsatisfactory, and depend on many unpredictable and inconsistent factors. How to cite this:Tas EE, Kir EA, Yilmaz G, Yavuz AF. Accuracy of sonographic fetal weight estimation in full-term singleton pregnant women. Pak J Med Sci. 2019;35(1):34-38. doi: https://doi.org/10.12669/pjms.35.1.373 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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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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Influence of sonographic fetal weight estimation in (suspected) fetal macrosomia on perinatal outcome

10.1055/s-0040-1717196 ◽

2020 ◽

Author(s):

J Pretscher ◽

S Kehl ◽

P Stelzl ◽

FM Stumpfe ◽

A Mayr ◽

...

Keyword(s):

Perinatal Outcome ◽

Fetal Weight ◽

Fetal Macrosomia ◽

Weight Estimation ◽

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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