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Maternal obesity, associated complications and risk of prematurity

H Aly1, T Hammad, A Nada

  • 1Department of Newborn Services, The George Washington University Medical Center, Washington, DC 20037, USA. haly@mfa.gwu.edu

Journal of Perinatology : Official Journal of the California Perinatal Association
|August 21, 2009
PubMed

Insights

Maternal obesity and morbid obesity did not directly increase prematurity rates. Instead, associated medical conditions in obese women were linked to preterm birth. Adequate prenatal care may help manage these risks.

Area of Science:

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

Background:

  • Maternal obesity is a growing concern in pregnancy.
  • Understanding its impact on gestational age and birth outcomes is crucial.
  • Previous studies suggest a link between obesity and prematurity.

Purpose of the Study:

  • To examine obesity rates over 12 years.
  • To assess the effect of maternal obesity on gestational age and birth weight.
  • To determine if race influences the association between maternal obesity and preterm birth.

Main Methods:

  • Retrospective analysis of 14,183 mother/infant pairs (1992-2003).
  • Stratification by pre-pregnancy Body Mass Index (BMI): not obese (<30), obese (30-39), morbidly obese (≥40).
  • Bivariate and multivariate analyses to control for confounding factors.

Main Results:

  • Obesity (12%) and morbid obesity (3%) rates increased over time.
  • Crude analysis showed higher prematurity rates in obese groups (16.7-20.3%) vs. non-obese (14.5%).
  • After controlling for complications (smoking, anemia, hypertension, diabetes), obesity was not directly associated with prematurity.

Conclusions:

  • No direct causal link found between maternal obesity and preterm birth.
  • Medical complications common in obese women appear to be the primary drivers of prematurity.
  • Further research is needed to evaluate prenatal care's role in mitigating prematurity in obese populations.
Abstract

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