Intrauterine growth restriction: definition and etiology

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Fetal Echocardiography and Pulsed-wave Doppler Ultrasound in a Rabbit Model of Intrauterine Growth Restriction
14:19

Fetal Echocardiography and Pulsed-wave Doppler Ultrasound in a Rabbit Model of Intrauterine Growth Restriction

Published on: June 29, 2013

H A Wollmann1

  • 1University Children's Hospital, Growth Research Center, Tübingen, Germany. hartmut.wollmann@uni-tuebingen.de

Hormone Research
|September 8, 1998
PubMed

Insights

Intrauterine growth restriction (IUGR) affects fetal growth and can lead to long-term health issues. Maternal smoking is a significant preventable cause, contributing to over one-third of IUGR cases.

Area of Science:

  • Pediatrics
  • Obstetrics
  • Neonatology

Background:

  • Intrauterine growth restriction (IUGR) is a common cause of perinatal complications and childhood growth impairment.
  • Accurate identification of at-risk infants through clear IUGR definitions is crucial.

Purpose of the Study:

  • To define Intrauterine growth restriction (IUGR) for accurate identification of at-risk infants.
  • To review the etiologic factors contributing to IUGR.

Main Methods:

  • Review of recent literature on IUGR definitions and classifications.
  • Analysis of genetic and environmental factors influencing birth weight variations.

Main Results:

  • IUGR is defined as birth weight/length below the 10th percentile for gestational age (GA) with evidence of pathological fetal growth restriction.
  • Genetic factors account for one-third of birth weight variations, while environmental factors account for two-thirds.
  • Maternal smoking during pregnancy is the most significant preventable environmental cause, responsible for over one-third of IUGR newborns.
  • In at least 40% of cases, no underlying pathology for IUGR can be identified.

Conclusions:

  • A precise definition of IUGR is essential for identifying infants at risk.
  • Environmental factors, particularly maternal smoking, play a critical role in IUGR development.
  • Further research is needed to identify underlying pathologies in unexplained IUGR cases.

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