scholarly journals Estimation of Fetal Birth Weight Using Ultra Sonographic Parameters

1970 ◽  
Vol 39 (135) ◽  
pp. 284-286
Author(s):  
Kaveeta Dawaka ◽  
G C Das
Keyword(s):  
Birth Weight ◽  
Fetal Weight ◽  
Weight Estimation ◽  
Term Pregnancy ◽  
Femur Length ◽  
Actual Weight ◽  
Medical College ◽  
Biparietal Diameter ◽  
Fetal Birth Weight ◽  
The Mean

One hundred antenatal patients were studied at term pregnancy at Gauhati Medical College, Guwahati, andfetal birth weight estimation was done in utero Ultrasono-graphically. The parameters measured wereAbdominal Circumference (AC), Biparietal diameter (BPD) and Femur Length (FL), Fetal weightprediction was done with Shepards formula using AC and BPD as well as Hadlocks formula using FL andAC. The scan delivery interval was maintained at 72 hours or less. Results of both formulae were comparedwith the actual fetal birthweight taken within 15 minutes of delivery. With Shepards formula, the predictedfetal weight was within 100 gm of the actual fetal weight in 71% cases, within 150gm in 86% cases, within200 gms in 93% cases and within 250 gms in 98%. With Hadlocks formula, the predicted birthweight waswithin 100 gms of the actual fetal weight in 72% cases, within 150 gms in 83%, within 200 gms in 92%cases and within 300 gms in 98%. The mean percent error calculated as Error % = Predicted weight - actualweight divided by actual weight x 100 was 2.9% with Shepards formula and 3% with Hadlocks. These datathus support a significant correlation between ultrasonographic estimation and actual fetal birth weight.Key Words: Fetal birth weight, AC, BPD, FL

ESTIMATION OF FETAL WEIGHT BY CLINICAL METHODS AND ULTRASOUND AND CORRELATING ITS ACCURACY WITH ACTUAL BIRTH WEIGHT IN TERM PREGNANCIES AT ANMMCH, GAYA, BIHAR

2021 ◽  
pp. 17-19
Author(s):  
Kumari Ragini ◽  
Amit Kumar ◽  
Reena Kumari ◽  
Debarshi Jana
Keyword(s):  
Birth Weight ◽  
Prospective Study ◽  
Fetal Weight ◽  
Term Pregnancy ◽  
Abdominal Girth ◽  
Medical College ◽  
Obstetrics And Gynaecology ◽  
Clinical Methods ◽  
Fetal Birth Weight ◽  
A Prospective Study

Objective:This study was to estimate the fetal weight in term pregnancy by clinical methods and ultrasound and to compare the results with actual birth weight (ABW). Material and Methods:This study was conducted at Department of Obstetrics and Gynaecology, Anugrah Narayan Magadh Medical College and Hospital, Gaya, Bihar from December 2019 to May 2020. It was a prospective study covering 200 pregnant women at term gestation. Results: Estimated birth weight by abdominal girth × symphysis fundal height (AG × SFH) formula was closest to the ABW (P = 0.060), as compared to the estimated birth weight by Johnson's formula (P = 0.000) and Hadlock's formula (P = 0.000). Therefore, of the three formulae studied, AG × SFH formula had better predictive value as compared to Johnson's and Hadlock's formulae. The accuracy of AG × SFH (Insler's formula) for estimating the fetal weight at term was found to be comparable to Hadlock's formula (P= 0.104). Conclusion: Clinical estimation of birth weight denitely has a role in the management of labor and delivery. AG × SFH is a simple, easy, costeffective, and universally applicable method to predict fetal birth weight which can be used even by paramedics like midwives and also in centers where ultrasound is not available.

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

2013 ◽  
Vol 5 (1) ◽  
pp. 22-25 ◽  
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.

Accuracy of Prediction of Birth Weight by Fetal Ultrasound

2020 ◽  
Vol 2 (2) ◽  
pp. 11-14
Author(s):  
Sumnima Acharya ◽  
Awadhesh Tiwari
Keyword(s):  
Birth Weight ◽  
Well Being ◽  
Cross Sectional Study ◽  
Fetal Weight ◽  
Weight Estimation ◽  
Fetal Ultrasound ◽  
Cross Sectional ◽  
Actual Weight ◽  
Medical College ◽  
Accuracy Of Prediction

Introduction: Fetal weight estimation using ultrasonography (USG) is beneficial for the better feto-maternal outcome. This study was done to determine the accuracy of prediction of birth weight by fetal ultrasound. Methods: This was a cross-sectional study carried out in the Department of Radio diagnosis, Lumbini Medical College and Teaching Hospital (LMCTH), Palpa, Nepal from1st June to 31st December 2018.Fetal weight was calculated by USG in 325 women using Hadlock’s formula and correlated with birth weight. Results: Our study showed that fetal ultrasound using Hadlock’s formula has error in estimation of fetal weight by 189gm (SD: 111 gm). In 91.3% of the cases, there was an error of estimation by less than 10% compared to actual weight. Conclusion: It can be concluded that sonographic estimation of birth weight can be recommended to yield a better prediction of birth weight and to further evaluate fetal well-being.  

scholarly journals Comparison of various method of fetal birth weight estimation in term pregnancy

2018 ◽  
Vol 7 (3) ◽  
pp. 1058
Author(s):  
Darshit G. Prajapati ◽  
Riddhi M. Patel
Keyword(s):  
Birth Weight ◽  
Large Scale ◽  
Low Cost ◽  
Mode Of Delivery ◽  
Ease Of Use ◽  
Fetal Weight ◽  
Term Pregnancy ◽  
Actual Weight ◽  
Increased Risk ◽  
Fetal Birth Weight

Introduction: Knowledge of fetal weight in utero is vital for the obstetrician in deciding whether or not to deliver the fetus as well as in fixing the mode of delivery. Both low birth weight and excessive fetal weight at delivery are associated with increased risk of newborn complications during labor and the puerperium. Various clinical formulae like Johnson's formula & Dare's formula and USG are in use for fetal weight estimation.Objectives: The aim of this study was to assess the fetal weight in term pregnancies by various methods- Dare’s formula, Johnson's formula and Hadlock's formula using ultrasound, and to compare the methods after knowing the actual weight of the baby after birth.Methods: It is a prospective observational study of 227 women at term pregnancy at GMERS medical college & Hospital, sola , Ahmedabad from April 2014 to April 2016. The formulas used in this study are: Johnson's formula, Dare’s formula and Hadlock-4 formula using ultrasound.Result: Results vary in terms of accuracy with various methods employed for estimating the fetal weight. This study showed that Hadlock-4 was the best indicator among all other methods assessed followed by Dare’s formula.Conclusion: Whenever the Facility is available, Ultrasound is the best method for birth weight assessment. Dare’s formula is an inexpensive method for screening for fetal growth restriction. It continues to be used in many countries on large scale because of its low cost, ease of use, and need for little training as the setup for ultrasonographic evaluation is not readily available in rural setups.

scholarly journals Validation of Sonographic Fetal Weight Estimators Among Term Parturients in Uganda

2020 ◽  
Author(s):  
Senai Goitom Sereke ◽  
Richard Okello Omara ◽  
Felix Bongomin ◽  
Sarah Nakubulwa ◽  
Harriet Nalubega Kisembo
Keyword(s):  
Birth Weight ◽  
Mode Of Delivery ◽  
Mean Difference ◽  
Fetal Weight ◽  
Abdominal Circumference ◽  
Weight Estimation ◽  
Fetal Weight Estimation ◽  
Biparietal Diameter ◽  
Mulago National Referral Hospital ◽  
Fetal Birth Weight

Abstract BackgroundAccuracy of fetal weight estimation by ultrasound is essential in making decisions on the time and mode of delivery. There are many proposed formulas for fetal weight estimation such as Hadlock 1, Hadlock 2, Hadlock 3, Hadlock 4 and Shepard. What best applies to the Ugandan population isn’t known since no validation of any of the formulas has been done before. The primary aim of this study was to determine the accuracy of sonographic estimation of fetal weight using five most commonly used formulas, and analyze formula variations for different weight ranges. MethodsThis was a hospital based prospective cohort study at Mulago National Referral Hospital, Kampala, Uganda. A total of 356 pregnant women who consented and were within three days of birth, prenatal ultrasound fetal weight determined by measuring the biparietal diameter, head circumference, abdominal circumference, femoral length, and then was compared with actual birth weight. ResultsThe overall accuracy of Hadlock 1, Hadlock 2, Hadlock 3, Hadlock 4 and Shepard formula were 66.9%, 73.3%, 77.3%, 78.4% and 69.7% respectively. All Hadlocks showed significant mean difference between weight estimates and actual birth weight (p<0.01) whereas Shepard formula did not [p - 0.2], when no stratification of fetal weights was done. However, all Hadlocks showed a none significant (p-values > 0.05) mean difference between weight estimates and actual birth weight when the actual birth weight was ≥4000.0gms. Shepard weight estimates showed a none significant mean difference when actual birth weight was <4000gms. Bland-Altman graphs also showed a better agreement of weight estimated by Shepard formula and actual birth weights. ConclusionAll the five formulas were accurate at estimating actual birth weights within 10% accuracy. However, this accuracy varied with the fetal birth weight. Shepard was more accurate in estimating actual birth weights <4000grams whereas all Hadlocks were more accurate when the actual birthweight was ≥ 4000grams.

scholarly journals Prospective verification of sonographic fetal weight estimators among term parturients in Uganda

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Senai Goitom Sereke ◽  
Richard Okello Omara ◽  
Felix Bongomin ◽  
Sarah Nakubulwa ◽  
Harriet Nalubega Kisembo
Keyword(s):  
Birth Weight ◽  
Mode Of Delivery ◽  
Mean Difference ◽  
Fetal Weight ◽  
Abdominal Circumference ◽  
Weight Estimation ◽  
Fetal Weight Estimation ◽  
Biparietal Diameter ◽  
Mulago National Referral Hospital ◽  
Fetal Birth Weight

Abstract Background Accuracy of fetal weight estimation by ultrasound is essential in making decisions on the time and mode of delivery. There are many proposed formulas for fetal weight estimation such as Hadlock 1, Hadlock 2, Hadlock 3, Hadlock 4 and Shepard. What best applies to the Ugandan population is not known since no verification of any of the formulas has been done before. The primary aim of this study was to determine the accuracy of sonographic estimation of fetal weight using five most commonly used formulas, and analyze formula variations for different weight ranges. Methods This was a hospital based prospective cohort study at Mulago National Referral Hospital, Kampala, Uganda. A total of 356 pregnant women who consented and were within 3 days of birth were enrolled. Prenatal ultrasound fetal weight determined by measuring the biparietal diameter, head circumference, abdominal circumference, femoral length, and then was compared with actual birth weight. Results The overall accuracy of Hadlock 1, Hadlock 2, Hadlock 3, Hadlock 4 and Shepard formula were 66.9, 73.3, 77.3, 78.4 and 69.7% respectively. All Hadlocks showed significant mean difference between weight estimates and actual birth weight (p < 0.01) whereas Shepard formula did not [p - 0.2], when no stratification of fetal weights was done. However, all Hadlocks showed a none significant (p-values > 0.05) mean difference between weight estimates and actual birth weight when the actual birth weight was ≥4000.0 g. Shepard weight estimates showed a none significant mean difference when actual birth weight was < 4000 g. Bland-Altman graphs also showed a better agreement of weight estimated by Shepard formula and actual birth weights. Conclusion All the five formulas were accurate at estimating actual birth weights within 10% accuracy. However, this accuracy varied with the fetal birth weight. Shepard was more accurate in estimating actual birth weights < 4000 g whereas all Hadlocks were more accurate when the actual birthweight was ≥4000 g.

scholarly journals Accuracy of ultrasonic fetal weight estimation using head and abdominal circumference and femur length

2005 ◽  
Vol 58 (11-12) ◽  
pp. 548-552 ◽  
Author(s):  
Ljiljana Mladenovic-Segedi ◽  
Dimitrije Segedi
Keyword(s):  
Birth Weight ◽  
Head Circumference ◽  
Fetal Weight ◽  
Abdominal Circumference ◽  
Weight Estimation ◽  
Fetal Head ◽  
Total Body Mass ◽  
Femur Length ◽  
Fetal Weight Estimation ◽  
Gynecology And Obstetrics

Introduction Former investigations have shown that the accuracy of fetal weight estimation is significantly higher if several ultrasonic fe?tal parameters are measured, because the total body mass depends on the size of fetal head, abdominal circumference and femur length. The aim of this investigation was to establish the best regression model, that is a number of combinations of fetal parameters providing the most accurate fetal weight estimation in utero in our population. Material and methods This prospective study was carried out at the Gynecology and Obstetrics Clinic of the Clinical Center Novi Sad. It included 270 pregnant women with singleton pregnancies within 72 hours of delivery who underwent ultrasound measurements of the biparietal diameter (BPD), head circumference (HC), ab?dominal circumference (AC) and femur length (FL). Results In regard to fetal weight estimation formulas, the deviation was lowest using regression models that simultaneously analyzed four fetal parameters (0.55%) with SD ?7.61%. In these models the estimates of fetal weights were within ?5% of actual birth weight in 48.89%, and within ?10% of actual birth weight in 81.48%. Good results were also obtained using AC, FL measurements (0.92% ? 8.20) as well as using AC, HC, FL measurements (-1.45% ? 7.81). In our sample the combination of AC and FL model gave better results in fetal weight estimation (0.92 ? 8.20%) than the one using BPD and AC (2.97 ? 8.83%). Furthermore, the model using parameters AC, HC and FL showed a lower error in accuracy (-1.45 ? 7.81%) than the model using BPD, AC and FL (2.51 ? 7.82%). Conclusion This investigation has confirmed that the accuracy of fetal weight estimation increases with the number of measured ultra?sonic fetal parameters. In our population the greatest accuracy was obtained using BPD, HC, AC and FL model. In cases when fast estimation of fetal weight is needed, AC, HC, FL model may be appropriate, but if fetal head circumference cannot be measured (amnion rupture and/or fetal head already in the pelvis) the AC, FL model should be used.

Estimation of fetal weight by ultrasonography after preterm premature rupture of membranes: comparison of different formulas

2017 ◽  
Vol 45 (2) ◽  
Author(s):  
Sertac Esin ◽  
Mutlu Hayran ◽  
Yusuf Aytac Tohma ◽  
Mahmut Guden ◽  
Ismail Alay ◽  
...  
Keyword(s):  
Birth Weight ◽  
Gestational Age ◽  
Fetal Weight ◽  
Percentage Error ◽  
Weight Estimation ◽  
Premature Rupture ◽  
Preterm Premature Rupture ◽  
Absolute Percentage Error ◽  
The Mean ◽  
Weight Groups

AbstractObjective:To compare different ultrasonographic fetal weight estimation formulas in predicting the fetal birth weight of preterm premature rupture of membrane (PPROM) fetuses.Methods:Based on the ultrasonographic measurements, the estimated fetal weight (EFW) was calculated according to the published formulas. The comparisons used estimated birth weight (EBW) and observed birth weight (OBW) to calculate the mean absolute percentage error [(EBW–OBW)/OBW×100], mean percentage error [(EBW–OBW)/OBW×100)] and their 95% confidence intervals.Results:There were 234 PPROM patients in the study period. The mean gestational age at which PPROM occured was 31.2±3.7 weeks and the mean gestational age of delivery was 32.4±3.2 weeks. The mean birth weight was 1892±610 g. The median absolute percentage error for 33 formulas was 11.7%. 87.9% and 21.2% of the formulas yielded inaccurate results when the cut-off values for median absolute percentage error were 10% and 15%, respectively. The Vintzileos’ formula was the only method which had less than or equal to 10% absolute percentage error in all age and weight groups.Conclusions:For PPROM patients, most of the formulas designed for sonographic fetal weight estimation had acceptable performance. The Vintzileos’ method was the only formula having less than 10% absolute percentage error in all gestational age and weight groups; therefore, it may be the preferred method in this cohort. Amniotic fluid index (AFI) before delivery had no impact on the performance of the formulas in terms of mean percentage errors.

scholarly journals ACCURACY OF ULTRASOUND VERSUS CLINICAL FETAL WEIGHT ESTIMATION AT TERM WITH ACTUAL BIRTH WEIGHT IN KENYATTA NATIONAL HOSPITAL

2017 ◽  
Vol 1 (1) ◽  
pp. 22
Author(s):  
Dr. Daniel K. Wanjaria ◽  
Prof. Koigi Kamau
Keyword(s):  
Birth Weight ◽  
Fetal Weight ◽  
Ultra Sound ◽  
Categorical Variables ◽  
Weight Estimation ◽  
National Hospital ◽  
Actual Weight ◽  
Kenyatta National Hospital ◽  
Fetal Weight Estimation ◽  
Clinical Methods

Purpose: The purpose of this study was to correlate fetal weight estimation by ultrasound and clinical methods with actual birth weight in KNH.Methodology: This is a prospective comparative study. The design was suitable because it enabled comparison of the predictive value, sensitivity and specificity in estimating fetal weight which is known after birth. Study area was KNH Obstetric wards. The study population was all pregnant women admitted to obstetric wards for elective caesarean delivery and study period was February -March 2016. Data was analysed using SPSS version 20. Categorical variables were presented as proportions in tables and graphs, bars or pie charts). Continuous variable were summarized as means or medians and presented in table form.Results: The findings show that the correlation between actual weight and Ultra Sound estimated weight was significant (r=0.65, p<0.000). The findings further showed that the proportion of Ultra Sound methods estimations within 10% of the actual birth weight was 44% of the overall weights. Clinical methods estimations within 10% of the actual birth weight were 47% of the overall weights. The mean difference between actual birth weights and ultra sound estimated weights were statistically insignificantThe findings revealed that the correlation between actual weight and clinical methods estimated weight was stronger (r=0.79, p<0.000) as compared to the correlation between actual weight and Ultra Sound estimated weight (r=0.65, p<0.000).Unique contribution to theory, practice and policy: The finding of this study may influence further studies and decision on estimation of fetal weight. If clinical estimation is equal or same as ultrasound estimation then it can be recommended that all mothers undergo this instead of ultrasound for estimation of fetal weight. The results may be shared with the University of Nairobi, Kenyatta National Hospital and the Ministry of Health and any policy change resulting from this can be rolled down to counties.

scholarly journals TO COMPARE ESTIMATION OF GESTATIONAL AGE BY FOETAL TRANSCEREBELLAR DIAMETER WITH BIPARIETAL DIAMETER`, FEMUR LENGTH, ABDOMINAL CIRCUMFERENCE, HEAD CIRCUMFERENCE AT DEPARTMENT OF OBSTETRICS AND GYNAECOLOGY AT SMS MEDICAL COLLEGE, JAIPUR

2020 ◽  
Vol 4 (6) ◽  
Author(s):  
Samta Solanki ◽  
Anusha S ◽  
B S Meena
Keyword(s):  
Gestational Age ◽  
Cross Sectional Study ◽  
Abdominal Circumference ◽  
Third Trimester ◽  
Cross Sectional ◽  
Femur Length ◽  
Medical College ◽  
Obstetrics And Gynaecology ◽  
Biparietal Diameter ◽  
The Mean

Background: Ultrasonographic assessment of gestational age by using different foetal parameter such as BPD, FL, AC are highly reliable in first and second trimester in pregnancy. In third trimester reliability of any single parameter has limitations. Methods: This was a hospital based comparative cross-sectional study done in the Department of Obstetrics and Gynaecology, S.M.S. Medical College and attached hospitals, Jaipur, Rajasthan. The period of study was from June 2018 to October 2019. Results: The mean TCD at 15 weeks and 40 weeks was 15.00 ± 0.00mm and 53.33±1.155mm respectively. The mean BPD at 16 weeks and 40 weeks was 33.50±0.70mm and 93±1.528mm respectively. The mean HC at 15 weeks and 40 weeks was 111.00±1,41mm and 340±2.00mm respectively. The mean FL at 15 weeks and 40 weeks was 18.50±0.70mm and 77.67±1.528mm respectively. The mean AC at 15 weeks and 40 weeks was 99.00±1.41mm and 365.33±8.32mm respectively. Conclusion:  We conclude that foetal transcerebellar diameter can thus be used as an alternative foetal parameter to assess gestational age and can be used in cases of wrong dates or when other routine parameters are not conclusive or did not accurately predict gestational age for e.g. in cases of hydrocephalus, brachycephaly, dolicocephaly, intrauterine growth restriction, achondroplasia or short limb dwarfism. Keywords: Gestational age, Linear regression, BPD

Sign in / Sign up

Export Citation Format

Share Document