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Related Experiment Videos

Fetal ultrasound biometry: 1. Head reference values.

J Kurmanavicius1, E M Wright, P Royston

  • 1Department of Obstetrics, Zurich University Hospital, Switzerland.

British Journal of Obstetrics and Gynaecology
|July 30, 1999
PubMed
Summary

This study provides reliable reference ranges and Z scores for fetal head ultrasound biometry using a large dataset. These tools aid in accurate fetal growth assessment during pregnancy.

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Area of Science:

  • Perinatology
  • Medical Imaging
  • Fetal Development

Background:

  • Accurate fetal biometry is crucial for monitoring pregnancy progress and detecting potential growth abnormalities.
  • Existing reference ranges may have limitations in sample size or distribution, necessitating updated data.
  • Standardized biometry measurements are essential for reliable clinical interpretation.

Purpose of the Study:

  • To establish comprehensive reference ranges and Z-score calculation methods for fetal head ultrasound biometry.
  • To cover a wide gestational age range (12-42 weeks) with a large, evenly distributed sample.
  • To provide tools for computer-aided evaluation of fetal ultrasound data.

Main Methods:

  • Prospective, cross-sectional study design.

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  • Data collected from 6557 pregnant women at the University Hospital of Zurich.
  • Regression models used to estimate mean and standard deviation for biparietal diameter, occipito-frontal diameter, head circumference, and cephalic index.

    • Main Results:

    • Centile charts, tables, and regression formulae generated for key fetal head parameters.
    • Biparietal diameter and occipito-frontal diameter measurements from 6217 and 5510 fetuses, respectively.
    • Developed an Excel application for Z-score calculation, with detailed macros provided.

    Conclusions:

    • Presented validated centile charts, tables, and regression formulae for fetal head ultrasound biometry.
    • The derived data are based on a large, minimally selected sample, enhancing reliability.
    • Provided tools for computer-aided assessment of fetal ultrasound biometry, aiding clinical decision-making.