The effect of the increasing prevalence of maternal obesity on perinatal morbidity

G C Lu1, D J Rouse, M DuBard

  • 1Center for Research in Women's Health, Department of Obstetrics and Gynecology, The University of Alabama at Birmingham, AL, USA.

Insights

Maternal obesity has significantly increased over 20 years, leading to higher risks of cesarean delivery, gestational diabetes, and large-for-gestational-age infants. Effective prevention strategies are crucial to manage these perinatal morbidities.

Area of Science:

  • Reproductive Health
  • Perinatal Medicine
  • Public Health

Background:

  • Maternal obesity prevalence has been rising globally.
  • Obesity during pregnancy is associated with adverse maternal and infant outcomes.
  • Understanding temporal trends in maternal obesity and its perinatal risks is essential for public health interventions.

Purpose of the Study:

  • To assess temporal trends in maternal obesity over a 20-year period.
  • To evaluate the relative and attributable perinatal risks associated with maternal obesity.
  • To analyze changes in these risks across different 5-year intervals.

Main Methods:

  • Retrospective cohort study utilizing a regional perinatal database (1980-1999).
  • Inclusion criteria: women receiving prenatal care and delivering within the health system.
  • Outcome measures: annual mean maternal weight, obesity prevalence (BMI > 29 kg/m², weight > 200 lb), and risks for cesarean delivery, gestational diabetes, and large-for-gestational-age infants.

Main Results:

  • Mean maternal weight increased by 20% (144-172 lb) from 1980-1999.
  • Obesity prevalence (BMI > 29 kg/m²) rose from 16.3% to 36.4%.
  • Obese women faced increased risks for cesarean delivery (aRR 1.5-1.8), gestational diabetes (aRR 1.8-2.9), and large-for-gestational-age infants (aRR 1.8-2.2).
  • Obesity-attributable cesarean deliveries increased from 3.9% to 11.6%; gestational diabetes from 12.8% to 29.6%; large-for-gestational-age infants from 6.5% to 19.1%.

Conclusions:

  • Maternal obesity rates and associated perinatal risks have significantly increased over two decades.
  • The rising prevalence of maternal obesity poses a substantial challenge to reducing perinatal morbidities.
  • Effective interventions to prevent and manage maternal obesity are urgently needed to mitigate adverse perinatal outcomes.
Abstract

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