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Estimation of fetal weight with the use of head, body, and femur measurements—A prospective study

  • Frank P. Hadlock
    Correspondence
    Reprint requests: Frank P. Hadlock, M.D., Jefferson Davis Hospital, Department of Radiology, 1801 Allen Parkway, Houston, TX 77019.
    Affiliations
    Department of Radiology, Baylor College of Medicine, Houston, Texas, USA

    Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas, USA

    the Department of Biometry, University of Texas School of Public Science Houston, Texas, USA
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  • R.B. Harrist
    Affiliations
    Department of Radiology, Baylor College of Medicine, Houston, Texas, USA

    Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas, USA

    the Department of Biometry, University of Texas School of Public Science Houston, Texas, USA
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  • Ralph S. Sharman
    Affiliations
    Department of Radiology, Baylor College of Medicine, Houston, Texas, USA

    Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas, USA

    the Department of Biometry, University of Texas School of Public Science Houston, Texas, USA
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  • Russell L. Deter
    Affiliations
    Department of Radiology, Baylor College of Medicine, Houston, Texas, USA

    Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas, USA

    the Department of Biometry, University of Texas School of Public Science Houston, Texas, USA
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  • Seung K. Park
    Affiliations
    Department of Radiology, Baylor College of Medicine, Houston, Texas, USA

    Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas, USA

    the Department of Biometry, University of Texas School of Public Science Houston, Texas, USA
    Search for articles by this author
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      Abstract

      In utero estimates of fetal weight were evaluated prospectively in 109 fetuses with the use of sonographic models developed in a previous study. This report confirms that the best in utero weight estimates result from the use of models based on measurements of head size, abdominal size, and femur length. Since the accuracy of these models (1 SD = 7.5%) is significantly better than those based on measurements of head and body (e.g., biparietal diameter, abdominal circumference), we recommend routine use of such models in obstetric sonography.

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