Association Between Prepregnancy Obesity and Health Behaviors, Adverse Conditions, and Birth Outcomes in South Dakota.

Introduction: Prepregnancy obesity has been shown to be associated with increased risk of adverse birth outcomes but little is known about the associations with health-related behaviors and conditions before, during and after pregnancy.

Methods: This retrospective cohort study used data from the South Dakota Pregnancy Risk Assessment Monitoring System (SD PRAMS) survey, which is an ongoing state-based surveillance system of maternal behaviors, attitudes, and experiences before, during, and shortly after pregnancy. The 2017 and 2018 SD PRAMS sampled a total of 3,805 mothers who were randomly selected from birth certificate records to be representative of all South Dakota women who delivered a live-born infant.