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Assessment of Gestational Age Using Ultrasound

Journal of Research in Medical and Dental Science
eISSN No. 2347-2367 pISSN No. 2347-2545

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Research - (2021) Volume 9, Issue 8

Assessment of Gestational Age Using Ultrasound

G Rajathi*

*Correspondence: G Rajathi, Department of Anatomy, Sree Balaji Medical College & Hospital Affiliated to Bharath Institute of Higher Education and Research, India, Email:

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Abstract

Determining gestational age in resource-poor settings is challenging because of limited availability of ultrasound technology and late first presentation to antenatal clinic. Last menstrual period (LMP), symphysio-pubis fundal height (SFH) and Ballard Score (BS) at delivery are therefore often used. This study explains the relationship between MSD, CRL and GA (USG) in the first trimester, BPD, HC, AC, FL and GA (USG) in the second trimester, EFW, BPD, HC, AC, FL and GA(USG) in the third trimester. From the results 3D and 4D USG will improvise the ability to assess early pregnancy viability and multiple gestations.

Keywords

Gestational age, Ultrasound

Introduction

Radiographic techniques were generally used to measure fetal dimensions prior to ultrasound, which had the drawback of exposing radiation to the foetus. Currently with increasing use of ultrasound, a non-invasive diagnostic procedure, there is a decrease in maternal morbidity and mortality. Ultrasonography is commonly used to estimate gestational age by measuring fetal dimensions like gestational sac diameter, crown rump length, biparietal diameter, abdominal circumference, head circumference and femur length. Hence this study aims to measure these fetal parameters and to obtain accurate gestational age [1-5].

Methodology

The study this study, 145 antenatal women were selected, observed, and underwent physical examination, lab investigations to rule out maternal diseases. patients were subjected to ultrasonogram, and the Gestational age was determined by measuring fetal parameters.

Results

The percentage of gestational age classes are depicted in Figure1 To prove a correlation between the fetal parameters in the second and third trimester with gestational age a correlation coefficient was calculated and found to be 0.995, 0.995, 0.993, 0.997 and the values were less than 0.001, thereby showing a positive correlation between these variables. gestational age a correlation coefficient was calculated and found to be 0.995, 0.995, 0.993, 0.997 and the values were less than 0.001, thereby showing a positive correlation between these variables.

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Figure 1. Percentage of gestational age classes.

Table1 explains that both CRL and MSD were contributing towards gestational age assessment and highly significant. BPD and FL were highly significant.

  GA BY USG BPD FL HC AC
Pearson Correlation GA BY USG 1 0.995 0.995 0.993 0.997
  BPD 0.995 1 0.993 0.996 0.993
  FL 0.995 0.993 1 0.993 0.993
  HC 0.993 0.996 0.993 1 0.991
  AC 0.997 0.993 0.993 0.991 1
  GA BPD FL HC AC  
GA   0.996639 0.996639 0.995293 0.997984
BPD     0.997312 0.997312 0.995293
FL       0.995293 0.995293
HC         0.993946

Table 1: CRL and MSD contribution.

HC was excluded in this model since it was not contributing.

Discussion and Conclusion

The study explains that there is a linear relationship between MSD, CRL and GA (USG) in the first trimester, BPD, HC, AC, FL, and GA(USG) in the second trimester, EFW, BPD, HC, AC, FL and GA(USG) in the third trimester. In case of abnormal measurements of fetal parameters disease conditions should be addressed. Multiple parameters should be used to assess gestational age. It is likely that the technological development of USG will continue and increases in ultrasound frequency will further improve image resolution of early pregnancies. 3D and 4D USG will also improve our ability to assess early pregnancy viability and multiple gestations [6-10].

References

Author Info

G Rajathi*

Department of Anatomy, Sree Balaji Medical College & Hospital Affiliated to Bharath Institute of Higher Education and Research, Chennai, Tamil Nadu, India
 

Citation: G Rajathi, Assessment of Gestational Age Using Ultrasound , J Res Med Dent Sci, 2021, 9(8): 64-65

Received Date: Jul 14, 2021 / Accepted Date: Aug 02, 2021 /

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