scholarly journals INNOVATE GESTATIONAL AGE ESTIMATION MODEL FOR IRAQI FETUSES BASED ON ULTRASOUND IMAGES MEASUREMENTS

2020 ◽  
pp. 17-30
Author(s):  
Ahlam A. HUSSAIN ◽  
Ebtesam F. KANGER
Keyword(s):  
Teaching Hospital ◽  
Fetal Growth ◽  
Gestational Age ◽  
Obstetric Care ◽  
Ultrasound Images ◽  
Estimation Model ◽  
Fetal Biometry ◽  
Obstetric Management ◽  
Gestational Age Estimation ◽  
Very High

Imaging by Ultrasound (US) is an accurate and useful modality for the assessment of gestational age (GA), estimation fetal weight, and monitoring the fetal growth during pregnancy, is a routine part of prenatal care, and that can greatly impact obstetric management. Estimation of GA is important in obstetric care, making appropriate management decisions requires accurate appraisal of GA. Accurate GA estimation may assist obstetricians in appropriately counseling women who are at risk of a preterm delivery about likely neonatal outcomes, and it is essential in the evaluation of the fetal growth and detection of intrauterine growth restriction. There are many formulas are used to estimate fetal GA in the world, but it's not specify for Iraqi population and leading to some error in GA estimation results, so the objective of this study is to innovate GA estimation model for Iraqi people. This study was performed in the department of Obstetrics and Gynecology in Al- Yarmouk Teaching Hospital and AL- Alawiya Teaching Hospital in Baghdad, Iraq, during 2019 on 200 pregnant women of singleton and normal pregnancies, fetal GA (20-40) weeks (W). The obtained dataset (fetal biometry), were utilized to create GA estimation model in Iraq using IBM SPSS Version 23 software package (IBM^® Software). The statistical analysis of proposed GA model showed, the correlation (R) of model is 0.987 it is very high value and this is a good result to obtain the best regression model. as well as the Std error of Estimation was 0.61095 this is very small value and indicate the best result. The significant of model P=0.000 That means the model, as a whole, is a significant fit to the data (because P < 0.05). Keywords: Ultrasound, Fetal Biometry, Estimation Gestational Age, SPSS.

scholarly journals Deep learning to estimate gestational age from blind ultrasound sweeps of the gravid abdomen

2021 ◽  
Author(s):  
Teeranan Pokaprakarn ◽  
Juan C Prieto ◽  
Joan T Price ◽  
Margaret P Kasaro ◽  
Ntazana Sindano ◽  
...  
Keyword(s):  
North Carolina ◽  
Gestational Age ◽  
Low Cost ◽  
Obstetric Care ◽  
Absolute Error ◽  
Test Set ◽  
Fetal Biometry ◽  
Rich Countries ◽  
Gestational Age Estimation

Background: Ultrasound is indispensable to gestational age estimation, and thus to quality obstetric care, yet high equipment cost and need for trained sonographers limit its use in low-resource settings. Methods: From September 2018 through June 2021, we recruited 4,695 pregnant volunteers in North Carolina and Zambia and obtained blind ultrasound sweeps (cineloops) of the gravid abdomen alongside standard fetal biometry. We trained a neural network to estimate gestational age from the sweeps and, in three test sets, assessed performance of the model and biometry against previously established gestational age. Results: In our main test set, model mean absolute error (MAE) was 3.9 days (standard error [SE] 0.12) vs. 4.7 days (SE 0.15) for biometry (difference -0.8 days; 95% CI -1.1, -0.5; p<0.001). Results were similar in North Carolina (difference -0.6 days, 95% CI -0.9, -0.2) and Zambia (-1.0 days, 95% CI -1.5, -0.5). Findings were supported in the test set of women who conceived by in vitro fertilization (model MAE 2.8 days [SE 0.28] vs. 3.6 days [SE 0.53] for biometry; difference -0.8 days, 95% CI -1.7, 0.2), and in the set of women from whom sweeps were collected by untrained users with low-cost, battery-powered devices (model MAE 4.9 days [SE 0.29] vs. 5.4 days [SE 0.28] for biometry; difference -0.6, 95% CI -1.3, 0.1). Conclusions: Our model estimated gestational age more accurately from blindly obtained ultrasound sweeps than did trained sonographers performing fetal biometry. These results presage a future where all pregnant people - not just those in rich countries - can access the diagnostic benefits of sonography.

scholarly journals Symphysio-Fundal Height Measurement as a Means of Gestational Age Assessment in the Second Half of Pregnancy at the University of Ilorin Teaching Hospital, Nigeria

2012 ◽  
Vol 6 (2) ◽  
pp. 27-32
Author(s):  
Folorunsho B Adewale ◽  
Munir'deen A Ijaiya
Keyword(s):  
Teaching Hospital ◽  
Gestational Age ◽  
Accurate Determination ◽  
Obstetric Care ◽  
Antenatal Clinic ◽  
Height Measurement ◽  
Age Assessment ◽  
Nigerian Women ◽  
Significant Difference ◽  
The University

Aims: Accurate determination of gestational age (GA) is an important part of obstetric care. The aim of this study is to determine the reliability of Symphsio-Fundal Height (SFH) measurement in assessing Gestational Age in the second half of pregnancy. Methods: A total of 390 pregnant Nigerian women carrying uncomplicated singleton pregnancies between the gestational age of 20-40 weeks had SFH measurements done at the antenatal clinic, and ultrasonic biparietal diameter (BPD) and femur length (FL) determination at the fetal assessment unit, maternity wing of the University of Ilorin Teaching Hospital, Ilorin, Nigeria. The patients were followed up subsequently and managed till delivery. At delivery each baby was examined within the first 48 hours of life and gestational age at birth was assigned using the Ballard method. Results: Of the 390 patients studied, SFH correctly assessed GA in 80% compared to 81.3% for BPD (P = 0.43), 82.1% for FL (P – 0.41), 84.1% for BPD and FL (p = 0.35. There is no significant difference in the sensitivity of SFH 93.1% and ultrasound 97.9%. There is also no significant difference in the margin of error between the true gestational ages obtained by the two methods (SFH 15-41days Vs ultrasound 15-33days). Combined ultrasound parameters(BP & FL),FL, BPD and SFH were progressively less closely correlated with the Ballard age of the fetus.Conclusions: This study showed that accurate measurement of the SFH is a reliable method of gestational age assessment in the second half of pregnancy.NJOG 2011 Nov-Dec; 6 (2): 27-32 DOI: http://dx.doi.org/10.3126/njog.v6i2.6753

scholarly journals Can trans-cerebellar diameter supersede other fetal biometry in measuring gestational age? A prospective study

2021 ◽  
Vol 52 (1) ◽  
Author(s):  
Rintu George ◽  
Umamageswari Amirthalingam ◽  
Mohamed Rafi Kathar Hussain ◽  
Vigneshwar Aditiya ◽  
A. M. Anand ◽  
...  
Keyword(s):  
Gestational Age ◽  
Abdominal Circumference ◽  
Radiology Department ◽  
Fetal Head ◽  
Cross Sectional ◽  
Femur Length ◽  
Fetal Biometry ◽  
Biparietal Diameter ◽  
A Prospective Study ◽  
Gestational Age Estimation

Abstract Background Estimation of gestational age plays a pivotal role in day to day clinical practice for appropriate management of newborn. The trans-cerebellar diameter can predict gestational age in cases of variations of fetal head shape such as dolichocephaly and brachycephaly or even when fetus is in posterior position. Trans-cerebellar diameter (TCD) may be useful in gestational age estimation. Aim and methodology To determine the accuracy of trans-cerebellar diameter in the estimation of gestational age of fetus and comparing the conventional parameters like head circumference, biparietal diameter, abdominal circumference and femur length in the measurement of gestational age. This is a prospective, cross-sectional analytical study done in the Radiology Department in those patients who were referred to the department for a routine antenatal ultra-sonogram checkup. Results Comparison of trans-cerebellar diameter with gestational age derived from last menstrual period indicates that there is a linear relationship throughout the gestational ages. There is a strong correlation of trans-cerebellar diameter with other conventional parameters namely biparietal diameter, femur length and abdominal circumference of which Femur length correlates well with the trans-cerebellar diameter. Correlation of transcerebellar diameter with gestational age shows a R2 of 0.995 (p value < 0.001). Conclusion Trans-cerebellar diameter is best in estimation of gestational age when compared to biparietal diameter, femur length and abdominal circumference. The regression formula derived from trans-cerebellar diameter measurement can be applied to determine the gestational age of fetus.

scholarly journals Gestational age Estimated by Abdominal Circumference in Bangladesh

2013 ◽  
Vol 26 (2) ◽  
pp. 64-67 ◽  
Author(s):  
Sabrina Q Rashid
Keyword(s):  
Fetal Growth ◽  
Gestational Age ◽  
Age Estimation ◽  
Polynomial Regression ◽  
Cross Sectional Study ◽  
Abdominal Circumference ◽  
Cross Sectional ◽  
Standard Deviations ◽  
Bangladeshi Population ◽  
Gestational Age Estimation

Objective: Abdominal circumference measurement is an important parameter for determining  fetal growth. Fetal growth will be more accurately assessed if we use tables constructed on  our own population. A table of fetal gestational age estimation by abdominal circumference in  Bangladeshi population is prepared, so that a quick assessment of its growth can be made.Methods: This study was a prospective, cross-sectional study, conducted on well dated, singleton  pregnancies. A table and a graph were prepared after fitting Polynomial regression models.Results: Nomogram for gestational age estimation by abdominal circumference was prepared.  1223 patients were included in the study. Percentiles, mean and standard deviations were  derived from the raw data. Polynomial regression model was a good fit to the data. Standard  deviations increased with gestational age. In the early second trimester Bangladeshi and  western studies were similar but as pregnancy advanced there was variation between the two  races.Conclusion: This chart can be useful for Bangladeshi population, by helping in assessment of  fetal growth and gestational age by abdominal circumference, especially in the 3rd trimester.  This is so, because abdominal circumference is very sensitive to fetal nutritional status. DOI: http://dx.doi.org/10.3329/bjog.v26i2.13781 Bangladesh J Obstet Gynaecol, 2011; Vol. 26(2) : 64-67  

scholarly journals Prediction of Late-Onset Small for Gestational Age and Fetal Growth Restriction by Fetal Biometry at 35 Weeks and Impact of Ultrasound–Delivery Interval: Comparison of Six Fetal Growth Standards

2021 ◽  
Vol 10 (13) ◽  
pp. 2984
Author(s):  
Ricardo Savirón-Cornudella ◽  
Luis Mariano Esteban ◽  
Rocío Aznar-Gimeno ◽  
Peña Dieste-Pérez ◽  
Faustino R. Pérez-López ◽  
...  
Keyword(s):  
Fetal Growth ◽  
Gestational Age ◽  
Small For Gestational Age ◽  
Detection Rate ◽  
Late Onset ◽  
University Hospital ◽  
Detection Rates ◽  
Growth Standards ◽  
Fetal Biometry ◽  
Increased Risk

Small-for-gestational-age (SGA) infants have been associated with increased risk of adverse perinatal outcomes (APOs). In this work, we assess the predictive ability of the ultrasound-estimated percentile weight (EPW) at 35 weeks of gestational age to predict late-onset SGA and APOs, according to six growth standards, and whether the ultrasound–delivery interval influences the detection rate. To this purpose, we analyze a retrospective cohort study of 9585 singleton pregnancies. EPWs at 35 weeks were calculated to the customized Miguel Servet University Hospital (MSUH) and Figueras standards and the non-customized MSUH, Fetal Medicine Foundation (FMF), INTERGROWTH-21st, and WHO standards. As results of our analysis, for a 10% false positive rate, the detection rates for SGA ranged between 48.9% with the customized Figueras standard (AUC 0.82) and 60.8% with the non-customized FMF standard (AUC 0.87). Detection rates to predict SGA by ultrasound–delivery interval (1–6 weeks) show higher detection rates as intervals decrease. APOs detection rates ranged from 27.0% with FMF to 7.9% with the Figueras standard. In conclusion, the ability of EPW to predict SGA at 35 weeks is good for all standards, and slightly better for non-customized standards. The APO detection rate is significantly greater for non-customized standards.

scholarly journals Sonographic Correlation of Gestational Age with Fetal Kidney Length

2016 ◽  
Vol 7 (2) ◽  
pp. 37-41
Author(s):  
Sandhya Hemraj ◽  
Sally M Abraham ◽  
US Vinayaka ◽  
G Ravichandra ◽  
Devdas Acharya
Keyword(s):  
Statistical Analysis ◽  
Gestational Age ◽  
Age Estimation ◽  
Linear Regression Analysis ◽  
Abdominal Circumference ◽  
P Value ◽  
Fetal Kidney ◽  
Fetal Biometry ◽  
Kidney Length ◽  
Gestational Age Estimation

ABSTRACT Background Gestational age estimation is one of the most important information conveyed by a sonologist when performing an obstetric ultrasound examination. The traditional fetal biometric parameters, such as biparietal diameter (BPD), head circumference (HC), femur length (FL), and abdominal circumference become increasingly unreliable for accurate gestational age estimation with advancing pregnancy, especially in 3rd trimester. This study was conducted to assess the role of fetal kidney length (KL) as an alternate parameter to assess gestational age in 2nd and 3rd trimesters. Aim To assess relationship between sonographic gestational age and fetal KL between 18 and 39 weeks of gestation. Settings and design Prospective, cross-sectional, single operator study conducted over a period of 1 year in a medical college hospital. Materials and methods Three hundred singleton pregnant women between 18 and 39 weeks of gestation were subjected to antenatal ultrasound. In addition to routine fetal biometry, measurements of fetal KL were made by noting distance between upper and lower poles of each kidney on a sagittal section of the fetal abdomen. The right and left KLs were averaged to obtain a single value for the purpose of statistical analysis. Statistical analysis Statistical analysis is done using SAS 9.2, SPSS 15.0, Stata 10.1, Med Calc 9.0.1, Systat 12.0, and R environment version 2.11.1. Fetal KL was expressed as mean ± standard deviation. Linear regression analysis was used to establish a relationship between sonographic gestational age in weeks and fetal KL. Level of significance was expressed as p value. Results A strong statistical correlation was found between sonographic gestational age and fetal KL. Nomograms and growth curves were constructed to correlate gestational age with fetal KL. Conclusion Fetal KL measurements can be used as alternate method of estimating gestational age in women with uncertain last menstrual periods (LMPs) and presenting late in the gestation for safe confinement. In fetal macrocephaly, hydrocephalus, short-limb dysplasias, and when fetal head is engaged, these measurements are valuable alternate parameters to assess gestational age since they are simple, not time-consuming, easy to identify, and measure. How to cite this article Hemraj S, Abraham SM, Acharya D, Ravichandra G, Vinayaka US. Sonographic Correlation of Gestational Age with Fetal Kidney Length. Int J Infertil Fetal Med 2016;7(2):37-41.

FETAL GROWTH

PEDIATRICS ◽  
1970 ◽  
Vol 45 (6) ◽  
pp. 937-944
Author(s):  
S. Gorham Babson ◽  
Richard E. Behrman ◽  
Richard Lessel
Keyword(s):  
United States ◽  
Sea Level ◽  
Fetal Growth ◽  
Gestational Age ◽  
Newborn Infants ◽  
Obstetric Care ◽  
The United States ◽  
White Mothers

Fetal growth in weight is presented on 40,000 single, newborn infants between 27 and 44 weeks' gestational age. They were delivered of white mothers who lived near sea level and received obstetric care from private physicians. Their mean birth weights were greater at term and after term than previously reported in the United States and were similar to those presented from the Scandinavian countries.

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