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Related Experiment Videos

An adjustable fetal weight standard

J Gardosi1, M Mongelli, M Wilcox

  • 1Department of Obstetrics and Gynaecology, University Hospital, Queen's Medical Centre, Nottingham, UK.

Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology
|September 1, 1995
PubMed
Summary
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Accurate fetal weight monitoring in antenatal care is crucial. This study developed a model linking predicted birth weight to fetal growth curves, considering factors like maternal characteristics and smoking, to create personalized growth charts.

Area of Science:

  • Obstetrics and Gynecology
  • Fetal Medicine
  • Maternal-Fetal Medicine

Background:

  • Fetal weight monitoring is essential for optimal antenatal care.
  • Current standards for fetal growth may not account for individual variations.
  • Accurate assessment of fetal growth is vital for identifying potential complications.

Purpose of the Study:

  • To develop an individually adjustable standard for fetal weight monitoring.
  • To create a fetal weight curve linking predicted birth weight to gestational age.
  • To establish normal limits for fetal growth based on population data.

Main Methods:

  • Analysis of a large database (38,114 pregnancies) of singleton, ultrasound-dated, term deliveries.
  • Derivation of a formula for median fetal weight and 90th/10th centile curves.

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  • Stepwise multiple regression to identify factors influencing birth weight.

    • Main Results:

    • Gestational age, sex, maternal height, weight, ethnic group, parity, and smoking significantly impact birth weight.
    • Smoking independently reduces birth weight, correlated with daily cigarette consumption.
    • Maternal factors and smoking effects on birth weight were quantified.

    Conclusions:

    • A model was developed to predict fetal weight and establish individualized growth curves.
    • Software was created to calculate adjusted normal ranges for fetal size using early pregnancy data.
    • This tool aids in antenatal surveillance of fetal growth for improved pregnancy care.