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Related Experiment Videos

A fetal growth standard derived from multiple modalities.

M Mongelli1, A Biswas

  • 1Department of Obstetrics and Gynecology, National University Hospital, Lower Kent Ridge Rd., 119074, Singapore, Singapore. obgjmm@nus.edu.sg

Early Human Development
|January 9, 2001
PubMed
Summary

This study developed a fetal weight growth standard using multiple data sources, including ultrasound and MRI. The resulting standard shows a consistent weekly gain of 5.2% of expected term birth weight.

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Area of Science:

  • Obstetrics and Gynecology
  • Fetal Medicine
  • Biostatistics

Background:

  • Accurate fetal weight estimation is crucial for monitoring fetal growth and identifying potential complications.
  • Existing fetal growth standards may have limitations due to reliance on specific methodologies, such as ultrasound estimations.

Purpose of the Study:

  • To establish a robust fetal weight growth standard by integrating data from various sources.
  • To create a more reliable reference for assessing normal fetal development across different gestational ages.

Main Methods:

  • A fetal growth standard was calculated using published birth weight data, sonographic weight standards, and MRI data.
  • Birth weights were adjusted for preterm infants, and all data were transformed into fractional growth curves relative to expected term weight.

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  • Averaging fractional curves from multiple modalities and calculating a standard deviation of 12% of the median generated the final standard, with separate curves for European and Chinese populations.

    • Main Results:

    • The derived fetal weight growth standard demonstrates a nearly linear relationship with gestational age.
    • The standard indicates a consistent weekly fetal weight gain of approximately 5.2% of the expected term birth weight.

    Conclusions:

    • Ultrasound-derived fetal weight curves can be influenced by biases in estimation formulas.
    • A fetal growth standard developed from multiple data sources offers a more reliable assessment of normal fetal growth compared to single-modality standards.