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References intervals for fetal biometrical parameters.

Francesc Figueras1, Margarita Torrents, Ana Muñoz

  • 1Department of Obstetrics and Gynecology, Institut Universitari Dexeus, Passeig Bonanova 67, E-08017, Barcelona, Spain. frafig@iudexeus.uab.es

European Journal of Obstetrics, Gynecology, and Reproductive Biology
|September 25, 2002
PubMed
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This study establishes normal fetal growth reference intervals for biparietal diameter, head circumference, abdominal circumference, and femur length. These clinically relevant fetal biometry measurements aid in assessing fetal development during pregnancy.

Area of Science:

  • Obstetrics and Gynecology
  • Fetal Medicine
  • Medical Imaging

Background:

  • Accurate fetal biometry is crucial for monitoring pregnancy progression and detecting potential growth abnormalities.
  • Establishing reliable reference ranges is essential for standardized clinical assessment.

Purpose of the Study:

  • To determine normal reference intervals for key fetal biometrical parameters.
  • To provide updated data for assessing fetal growth across different gestational ages.

Main Methods:

  • Cross-sectional study involving 9500 fetuses.
  • Prospective collection of antenatal ultrasound measurements from 23 to 41 weeks of gestation.
  • Retrospective data analysis of sonographic measurements for reference sample creation.

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Main Results:

  • Fetal biometrical parameters (biparietal diameter, head circumference, abdominal circumference, femur length) show distinct growth curves with gestational age.
  • Maximal weekly growth rates observed between 24-26 weeks gestation.
  • Significant increases in fetal size noted by 33 weeks gestation, with widening normal ranges.

Conclusions:

  • The established fetal size reference intervals are clinically significant for evaluating fetal development.
  • These data are applicable to populations with similar epidemiological characteristics and birth weight distributions.
  • Provides a valuable tool for antenatal care and management of fetal growth.