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Delivery BMI & Neonatal Morbidity Outcomes

Obstet Gynecol; ePub 2017 Oct 6; Kim, et al

A body mass index (BMI) of ≥60 at the time of delivery is significantly associated with increased neonatal morbidity and increased maternal complication rates, a recent study found. The retrospective, multicenter cohort study included singleton pregnancies between 23 and 42 weeks of gestation from January 2005 to April 2006. Women with BMI ≥60 were compared with a random sample with BMI between 30 and 59. Researchers found:

  • 338 women were included; 39 in the BMI ≥60 group.
  • Increasing BMI correlated with increasing neonatal morbidity, with the highest rates among those with BMI ≥60.
  • After adjustment for confounders, obese women with BMI <60 had at least a 75% reduction in odds of neonatal morbidity compared with women with BMI ≥60.
  • Maternal complication rates also significantly increased with BMI ≥60.


Kim T, Burn SC, Bangdiwala A, Pace S, Rauk P. Neonatal morbidity and maternal complication rates in women with delivery body mass index of 60 or higher. [Published online ahead of print October 6, 2017]. Obstet Gynecol. doi:10.1097/AOG.0000000000002316.