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Disproportionate alterations in body composition of large for gestational age neonates

M Hammami1, J C Walters, E M Hockman

  • 1Department of Pediatrics, University of Tennessee, Memphis, TN, USA.

The Journal of Pediatrics
|June 8, 2001
PubMed

Insights

Large for gestational age (LGA) neonates exhibit increased body fat and reduced lean body mass compared to appropriate for gestational age (AGA) infants. Maternal glucose intolerance further amplifies these body composition differences.

Area of Science:

  • Neonatal physiology
  • Pediatric endocrinology
  • Body composition analysis

Background:

  • Neonatal birth weight classification (Large for Gestational Age - LGA, Appropriate for Gestational Age - AGA) is crucial for identifying potential health risks.
  • Body composition differences between LGA and AGA neonates are not fully understood.
  • Maternal health conditions, such as diabetes, can influence fetal growth and neonatal body composition.

Purpose of the Study:

  • To compare the body composition of LGA and AGA neonates using dual-energy x-ray absorptiometry (DXA).
  • To investigate the impact of maternal glucose intolerance on neonatal body composition in LGA infants.

Main Methods:

  • Comparative study design involving LGA and AGA term infants.
  • Dual-energy x-ray absorptiometry (DXA) scans performed within the first few days of life.
  • Analysis included body weight, length, total body fat, lean body mass, and bone mineral content.

Main Results:

  • LGA neonates demonstrated significantly higher absolute amounts and proportions of total body fat and bone mineral content compared to AGA neonates.
  • LGA neonates showed significantly lower lean body mass as a percentage of body weight.
  • Infants classified as LGA born to mothers with impaired glucose tolerance exhibited the most pronounced changes in body fat and lean body mass percentages.

Conclusions:

  • LGA neonates possess distinct body composition profiles characterized by increased adiposity and decreased relative lean mass compared to AGA infants.
  • Impaired maternal glucose tolerance significantly exacerbates these body composition alterations in LGA neonates.
  • These findings highlight the importance of monitoring maternal metabolic health during pregnancy for neonatal outcomes.
Abstract

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