Maternal superobesity and perinatal outcomes

Nicole E. Marshall, Camelia Guild, Yvonne W. Cheng, Aaron B. Caughey, Donna R. Halloran

Research output: Contribution to journalArticlepeer-review

95 Scopus citations


Objective: The purpose of this study was to determine the effect of maternal superobesity (body mass index [BMI], <50 kg/m2) compared with morbid obesity (BMI, 40-49.9 kg/m2) or obesity (BMI, 30-39.9 kg/m2) on perinatal outcomes. Study Design: We conducted a retrospective cohort study of birth records that were linked to hospital discharge data for all liveborn singleton term infants who were born to obese Missouri residents from 2000-2006. We excluded major congenital anomalies and women with diabetes mellitus or chronic hypertension. Results: There were 64,272 births that met the study criteria, which included 1185 superobese mothers (1.8%). Superobese women were significantly more likely than obese women to have preeclampsia (adjusted relative risk [aRR], 1.7; 95% confidence interval [CI], 1.4-2.1), macrosomia (aRR, 1.8; 95% CI, 1.3-2.5), and cesarean delivery (aRR, 1.8; 95% CI, 1.5-2.1). Almost one-half of all superobese women (49.1%) delivered by cesarean section, and 33.8% of superobese nulliparous women underwent scheduled primary cesarean delivery. Conclusion: Women with a BMI of <50 kg/m2 are at significantly increased risk for perinatal complications compared with obese women with a lower BMI.

Original languageEnglish (US)
Pages (from-to)417.e1-417.e6
JournalAmerican journal of obstetrics and gynecology
Issue number5
StatePublished - May 2012


  • pregnancy outcome
  • superobesity

ASJC Scopus subject areas

  • Obstetrics and Gynecology


Dive into the research topics of 'Maternal superobesity and perinatal outcomes'. Together they form a unique fingerprint.

Cite this