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The Reliability of Biparietal Diameter and Femoral Length in Estimation the Gestational Age Using Ultrasonography

Received: 24 October 2014     Accepted: 7 November 2014     Published: 20 November 2014
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Abstract

Background: Assessment of fetal gestational age with ultrasound provides high accuracy and reliability, as ultrasound is safe, easy operating and cheap. Objectives: to predict the GA with BPD and FL, to derive equations from linear regression analysis of GA with BPD and FL this could be applied to determine the fetal GA, to compare between BPD and FL. Methods: there were 100 normal pregnancies (singleton) had been selected for the study during the second and third trimesters. They were scanned with ultrasound using 3.5 MHz probe applying the obstetrics protocol to measure the fetal biometrics. The length of femoral diaphysis was measured from upper end to lower end excluding epiphysis. The biparietal diameter was measured from the fetal skull when being in oval shape; two thalami should be equal in size. The diameter was drawn from inner to outer margins of the skull perpendicular to the thalami. Results: statistical tests such as correlation and linear regression had been used to get the correlation coefficients and linear equations. There was a strong positive correlation between gestational age and femoral length and biparietal diameter (r = 0.97, r = 0.98). The estimation of gestational age from biparietal diameter could be calculated from the equation GA= 3.385+0.359BPD, and the estimation of gestational age could be calculated from the equation GA= 7.890 + 0.388FL. The most accurate most accurate equation to estimate the fetal gestational age was derived from the equation GA= 4.970 +0.157FL+0.218BPD. Conclusion: The estimation of gestational age with fetal biparietal diameter and femoral length still remain the most common measurements to assess the fetal growth. Evaluation of gestational age with biparietal diameter and femoral length joined together is more accurate than biparietal diameter and femoral length when used separately.

Published in Journal of Gynecology and Obstetrics (Volume 2, Issue 6)
DOI 10.11648/j.jgo.20140206.17
Page(s) 112-115
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2014. Published by Science Publishing Group

Keywords

Reliability, Biparietal, Femoral, Estimation, Gestational Age, Ultrasonography

References
[1] Deter RL, Harrist RB. Assessment of normal fetal growth. In:Chervena FA, Isaacson GC, Campbell S, Editors. Ultrasound in Obstetrics and Gynecology.1993; 85 :361
[2] Deter RL. Evaluation of quantitative obstetrical ultrasound studies. In: Deter RL, Harrist RB, Birnholz JC, Haldlock FP, Churchill Living Stone 1986; 15-30.
[3] Pearce JM, Chazal RD. Establishing gestational age. In. Ultrasound in Obstetrics and Gynecology. 1st edition, Dewbary K, Meire H, Cosgrove D, Churchill Livingstone: Edinburg 1993; 211-21
[4] Haldlock FP, Deter RL, Harrist RB, Park SK. Estimating Fetal age: Computer assisted- analysis of multiple fetal growth parameters. Radiology 1984; 152(2):497-501.
[5] Haldlock FP, Deter RL, and Harrist RB.Fetal Biparietal diameter; A critical re-evaluation of the relation to menstrual age by means of real ultrasound: J.ultrasound Med. 1998; 1 : 97
[6] Haldlock FP. Determination of fetal age. In Athey P.A and Haldlock, F.P. Mosby Ultrasound in Obstetrics and Gynecology1985;
[7] Pretorius, D.H, Nelson, J.R. and Monco-Jonson, M.L.Fetal age estimation by ultrasound: the impact of measurement errors. Radiology 1984; 152: 763.
[8] Jordaan H.V.FEstimation of fetal weight by ultrasound.j.clin.ultrasound 1983; 11:59-66.
[9] Hill L.M., Breckle, R., Gehrking, W.C. and Obrien, P.C.Use of femur length in estimation of fetal weight. Am.j.Obstetric.Gynecol 1985; 152: 847.
[10] Fusun V., Ahmet S., Petek B., Tulay K., Turgut Y. Evaluation of Gestational Age Based on Ultrasound Fetal Growth Measurements; Yonei Medical Journal 42,(3): 300-301
[11] Chudleigh T., Thilaganathan B. Obstetric Ultrasound. Churchill Livingstone, 3rd edition 2014: 99-100
[12] Shalev E., E. Feldman, E. Weiner, and H. Zuckerman. Assessment of gestational age by ultrasonic measurement of femur length. Acta Obstetrica and Gynecologica et Scandinavica 1985; 64(1): 71
Cite This Article
  • APA Style

    Moawia Gameraddin, Baderldin Alhaj, Mead Zain Alabdeen. (2014). The Reliability of Biparietal Diameter and Femoral Length in Estimation the Gestational Age Using Ultrasonography. Journal of Gynecology and Obstetrics, 2(6), 112-115. https://doi.org/10.11648/j.jgo.20140206.17

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    ACS Style

    Moawia Gameraddin; Baderldin Alhaj; Mead Zain Alabdeen. The Reliability of Biparietal Diameter and Femoral Length in Estimation the Gestational Age Using Ultrasonography. J. Gynecol. Obstet. 2014, 2(6), 112-115. doi: 10.11648/j.jgo.20140206.17

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    AMA Style

    Moawia Gameraddin, Baderldin Alhaj, Mead Zain Alabdeen. The Reliability of Biparietal Diameter and Femoral Length in Estimation the Gestational Age Using Ultrasonography. J Gynecol Obstet. 2014;2(6):112-115. doi: 10.11648/j.jgo.20140206.17

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  • @article{10.11648/j.jgo.20140206.17,
      author = {Moawia Gameraddin and Baderldin Alhaj and Mead Zain Alabdeen},
      title = {The Reliability of Biparietal Diameter and Femoral Length in Estimation the Gestational Age Using Ultrasonography},
      journal = {Journal of Gynecology and Obstetrics},
      volume = {2},
      number = {6},
      pages = {112-115},
      doi = {10.11648/j.jgo.20140206.17},
      url = {https://doi.org/10.11648/j.jgo.20140206.17},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.jgo.20140206.17},
      abstract = {Background: Assessment of fetal gestational age with ultrasound provides high accuracy and reliability, as ultrasound is safe, easy operating and cheap. Objectives: to predict the GA with BPD and FL, to derive equations from linear regression analysis of GA with BPD and FL this could be applied to determine the fetal GA, to compare between BPD and FL. Methods: there were 100 normal pregnancies (singleton) had been selected for the study during the second and third trimesters. They were scanned with ultrasound using 3.5 MHz probe applying the obstetrics protocol to measure the fetal biometrics. The length of femoral diaphysis was measured from upper end to lower end excluding epiphysis. The biparietal diameter was measured from the fetal skull when being in oval shape; two thalami should be equal in size. The diameter was drawn from inner to outer margins of the skull perpendicular to the thalami. Results: statistical tests such as correlation and linear regression had been used to get the correlation coefficients and linear equations. There was a strong positive correlation between gestational age and femoral length and biparietal diameter (r = 0.97, r = 0.98). The estimation of gestational age from biparietal diameter could be calculated from the equation GA= 3.385+0.359BPD, and the estimation of gestational age could be calculated from the equation GA= 7.890 + 0.388FL. The most accurate most accurate equation to estimate the fetal gestational age was derived from the equation GA= 4.970 +0.157FL+0.218BPD. Conclusion: The estimation of gestational age with fetal biparietal diameter and femoral length still remain the most common measurements to assess the fetal growth. Evaluation of gestational age with biparietal diameter and femoral length joined together is more accurate than biparietal diameter and femoral length when used separately.},
     year = {2014}
    }
    

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  • TY  - JOUR
    T1  - The Reliability of Biparietal Diameter and Femoral Length in Estimation the Gestational Age Using Ultrasonography
    AU  - Moawia Gameraddin
    AU  - Baderldin Alhaj
    AU  - Mead Zain Alabdeen
    Y1  - 2014/11/20
    PY  - 2014
    N1  - https://doi.org/10.11648/j.jgo.20140206.17
    DO  - 10.11648/j.jgo.20140206.17
    T2  - Journal of Gynecology and Obstetrics
    JF  - Journal of Gynecology and Obstetrics
    JO  - Journal of Gynecology and Obstetrics
    SP  - 112
    EP  - 115
    PB  - Science Publishing Group
    SN  - 2376-7820
    UR  - https://doi.org/10.11648/j.jgo.20140206.17
    AB  - Background: Assessment of fetal gestational age with ultrasound provides high accuracy and reliability, as ultrasound is safe, easy operating and cheap. Objectives: to predict the GA with BPD and FL, to derive equations from linear regression analysis of GA with BPD and FL this could be applied to determine the fetal GA, to compare between BPD and FL. Methods: there were 100 normal pregnancies (singleton) had been selected for the study during the second and third trimesters. They were scanned with ultrasound using 3.5 MHz probe applying the obstetrics protocol to measure the fetal biometrics. The length of femoral diaphysis was measured from upper end to lower end excluding epiphysis. The biparietal diameter was measured from the fetal skull when being in oval shape; two thalami should be equal in size. The diameter was drawn from inner to outer margins of the skull perpendicular to the thalami. Results: statistical tests such as correlation and linear regression had been used to get the correlation coefficients and linear equations. There was a strong positive correlation between gestational age and femoral length and biparietal diameter (r = 0.97, r = 0.98). The estimation of gestational age from biparietal diameter could be calculated from the equation GA= 3.385+0.359BPD, and the estimation of gestational age could be calculated from the equation GA= 7.890 + 0.388FL. The most accurate most accurate equation to estimate the fetal gestational age was derived from the equation GA= 4.970 +0.157FL+0.218BPD. Conclusion: The estimation of gestational age with fetal biparietal diameter and femoral length still remain the most common measurements to assess the fetal growth. Evaluation of gestational age with biparietal diameter and femoral length joined together is more accurate than biparietal diameter and femoral length when used separately.
    VL  - 2
    IS  - 6
    ER  - 

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Author Information
  • Deparment of Diagnostic Radiologic Technology, Faculty of Applied Medical Sciences, Taibah University, Medina, Saudi Arabia

  • Department of Radiology and Medical Imaging, Alghad International Colleges for Applied Medical Sciences, Almedinah Almunawarah, Saudi Arabia

  • Department of Diagostic Radiologic Technology, Faculty of Radiological Sciences and Medical Imaging Alzaiem Alazhari University, Khartoum, Sudan

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