Assessment of fetal gestational age by ultrasonic measurement of bi-parietal diameter in the southern part of Rajasthan

Jaiswal, Prashant Kumar; Masih, William F.; Jaiswal, Sanjay; Chowdhary, D S

doi:10.4103/0975-2870.148839

Cited by 10 publications

(7 citation statements)

References 1 publication

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“…Extent of accuracy of gestational age (GA) estimate by transcerebellar diameter (TCD) In a study by Jaiswal et al,2 the biparietal growth rate during 27-34 weeks of pregnancy was 2.46 mm/week, which is close to that obtained in the present study. Fetal BPD generally increases rapidly during the second trimester with average growth rate of 3.1-3.36 mm/week during 13-28 weeks.…”

supporting

confidence: 89%

Comparison of Estimation of Gestational Age by Transverse Cerebellar Diameter with Biparietal Diameter in Third Trimester of Pregnancy

Gupta¹,

Sinha²,

Sharma³

et al. 2020

Journal of South Asian Federation of Obstetrics and Gynaecology

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Aims and objectives: To determine the accuracy of transverse cerebellar diameter for assessment of gestational age in comparison with biparietal diameter (BPD) in third trimester of pregnancy using the 1st day of the last menstrual period (LMP) for calculation of the actual period of gestation. Materials and methods: The study was a prospective observational study conducted on 150 antenatal patients between gestational ages 28 weeks and 40 weeks visiting the outpatient department and emergency of

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supporting

confidence: 89%

Comparison of Estimation of Gestational Age by Transverse Cerebellar Diameter with Biparietal Diameter in Third Trimester of Pregnancy

Gupta¹,

Sinha²,

Sharma³

et al. 2020

Journal of South Asian Federation of Obstetrics and Gynaecology

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“…Precise estimation of GA is crucial for investigation, diagnosis, and treatment of fetus in vitro. 13 This study models LMP-based GA (GALMP) considering lack of fit and fits a simple model of GALMP with a single explanatory variable BPD.…”

Section: Discussionmentioning

confidence: 99%

Modeling Gestational Age and Lack of Fit

Rahman¹,

Akter²,

Hossain³

et al. 2021

Journal of South Asian Federation of Obstetrics and Gynaecology

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Introduction: Gestational age (GA) refers to age of an unborn baby. Accurate determination of GA is crucial as precise calculation of GA helps reducing post-date labor induction and is particularly useful to assess viability in premature labor and in post-date deliveries. Aim: The aim of the article was to determine GA by a minimal number of fetal parameters along with greater accuracy. Materials and methods: This was a prospective cross-sectional study, comprising a total of 229 singleton pregnant mothers enrolled from December 2015 to November 2016 in Ibn Sina Diagnostic and Imaging Center and Ad-Din Hospital in Dhaka, Bangladesh. Multiple linear regression models were fitted with four fetal parameters, namely biparietal diameter (BPD), head circumference (HC), abdominal circumference (AC), and femur length (FL), and lack of fit was tested in each of the cases. In case of having a significant lack of fit, different types of transformation including Box-Cox transformation have been adopted on the variables to improve the adequacy of the model. Results: Among all the fitted models for gestational age by last menstrual period (GALMP), a model with a single explanatory variable, BPD, was found to be comparatively better than others. The Box-Cox transformation was taken on the dependent variable GALMP with λ that equals 0.2, and lack of fit test was not significant at 1% level (p-value = 0.027). Though the results from comparative models do not vary substantially, emphasis on BPD in GA calculation might suffice while cost of experimentation or screening is a grave concern. Conclusion: By considering the Box-Cox transformation and proper dealing of outliers, a model for GALMP was obtained without lack of fit where only the BPD appeared to be sufficient as an explanatory variable.

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“…However, all ultrasound measurements need to be performed by specially trained medical staff and the precision probably is influenced by the technical level of ultrasound examiners. Besides, some studies believed that the accuracy of EDD will gradually decrease with the increase of gestational weeks 9 . Therefore, the EDD should be determined once we obtain the data from LMP or the first accurate ultrasound examination 10 , 11 .…”

Section: Introductionmentioning

confidence: 99%

Estimated Date of Delivery With Electronic Medical Records By A Hybrid GBDT-GRU Model

Zhang

Xu³

et al. 2021

Preprint

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An accurate estimated date of delivery (EDD) helps pregnant women make adequate preparations before delivery and avoid the panic of parturition. EDD is normally derived from some formulates or estimated by doctors based on last menstruation period and ultrasound examinations. The main aim of this study was to develop a hybrid model to improve the accuracy of EDD and promote the health and safety of pregnant women and fetuses. This study attempted to combine antenatal examinations and electronic medical records to develop a hybrid model based on Gradient Boosting Decision Tree and Gated Recurrent Unit (GBDT-GRU). Besides exploring the features that affect the EDD, GBDT-GRU model obtained the results by dynamic prediction of different stages. The mean square error (MSE) and coefficient of determination (R2) were used to compare the performance among the different prediction methods. In addition, we evaluated predictive performances of different prediction models by comparing the proportion of pregnant women under the error of different days. The clinical data were collected with 33,222 pregnancy examination records from 5537 Chinese pregnant women who have given birth. Experimental results showed that the hybrid GBDT-GRU model outperformed other prediction methods with coefficient of determination (R2) of 0.84, mean square error (MSE) of 41.73. We also found that the GBDT-GRU model had a smaller deviation by comparing the bias between the actual delivery date and the EDD under different methods. In comparison with other prediction methods, the GBDT-GRU model provided better performance results. The results of this study are helpful for the development of guidelines for clinical delivery treatments, as it can assist clinicians in making correct decisions during obstetric examinations.

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Assessment of fetal gestational age by ultrasonic measurement of bi-parietal diameter in the southern part of Rajasthan

Cited by 10 publications

References 1 publication

Comparison of Estimation of Gestational Age by Transverse Cerebellar Diameter with Biparietal Diameter in Third Trimester of Pregnancy

Comparison of Estimation of Gestational Age by Transverse Cerebellar Diameter with Biparietal Diameter in Third Trimester of Pregnancy

Modeling Gestational Age and Lack of Fit

Estimated Date of Delivery With Electronic Medical Records By A Hybrid GBDT-GRU Model

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