Volume 2, Issue 6, November 2014, Page: 112-115
The Reliability of Biparietal Diameter and Femoral Length in Estimation the Gestational Age Using Ultrasonography
Moawia Gameraddin, Deparment of Diagnostic Radiologic Technology, Faculty of Applied Medical Sciences, Taibah University, Medina, Saudi Arabia
Baderldin Alhaj, Department of Radiology and Medical Imaging, Alghad International Colleges for Applied Medical Sciences, Almedinah Almunawarah, Saudi Arabia
Mead Zain Alabdeen, Department of Diagostic Radiologic Technology, Faculty of Radiological Sciences and Medical Imaging Alzaiem Alazhari University, Khartoum, Sudan
Received: Oct. 24, 2014;       Accepted: Nov. 7, 2014;       Published: Nov. 20, 2014
DOI: 10.11648/j.jgo.20140206.17      View  2723      Downloads  332
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.
Keywords
Reliability, Biparietal, Femoral, Estimation, Gestational Age, Ultrasonography
To cite this article
Moawia Gameraddin, Baderldin Alhaj, Mead Zain Alabdeen, The Reliability of Biparietal Diameter and Femoral Length in Estimation the Gestational Age Using Ultrasonography, Journal of Gynecology and Obstetrics. Vol. 2, No. 6, 2014, pp. 112-115. doi: 10.11648/j.jgo.20140206.17
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