First-trimester fetal biometry using transvaginal sonography

Authors

  • Dr D. M. Lasser,

    Corresponding author
    1. Columbia University College of Physicians and Surgeons, Department of Obstetrics and Gynecology, New York, USA
    • Columbia University, College of Physicians and Surgeons, Department of Obstetrics and Gynecology, 630 West 168th Street, New York, NY 10032, USA
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  • D. B. Peisner,

    1. Columbia University College of Physicians and Surgeons, Department of Obstetrics and Gynecology, New York, USA
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  • J. Vollebergh,

    1. Columbia University College of Physicians and Surgeons, Department of Obstetrics and Gynecology, New York, USA
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  • I. Timor-Tritsch

    1. Columbia University College of Physicians and Surgeons, Department of Obstetrics and Gynecology, New York, USA
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Abstract

First-trimester fetal biometry using transvaginal sonography is now feasible and desirable due to improved imaging and probe maneuverability. A study of 144 early normal pregnancies with precise dates is presented. Regression models were constructed for the crown–rump length, biparietal diameter, head circumference and abdominal circumference. Error analysis of the technique and calculations was performed. First-trimester fetal biometry may be used for obtaining precise estimates of gestational age and may help to detect early fetal maldevelopment resulting in abnormal growth. Copyright © 1993 International Society of Ultrasound in Obstetrics and Gynecology

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