Association Between Obesity During Pregnancy and the Use of Prenatal Services

Abstract

INTRODUCTION: Approximately 25% of women in the United States are obese (body mass index greater than 30 kg/m2). Obese women are at risk for poor perinatal outcomes, and studies imply that inadequate, late onset, or both of prenatal care are contributing factors in this population. We previously demonstrated that maternal obesity is actually associated with improved adequacy of prenatal care as measured by the Kotelchuck index and now further examine the use of specific prenatal services by otherwise uncomplicated obese women. METHODS: Retrospective cohort study of medically uncomplicated women who initiated prenatal care and delivered at our institution from January 2009 to December 2011. Maternal history and delivery information were obtained through chart abstraction. Use of specific prenatal care services including diabetic screening, ultrasound examinations, and hospitalization was compared between nonobese and obese women. RESULTS: A total of 320 women were evaluated, of whom 38% were obese. Mean (±standard error) length of hospital stay for combined intrapartum and postpartum care was 3.0±0.1 days in obese women compared with 2.9±0.1 days in nonobese women (P=.4). Both populations had similar diabetic screening compliance of 86.4% for nonobese and 86.8% for obese women (P=.9). However, obesity was significantly associated with more obstetrical ultrasonographic examinations with 48% obese women having five or more ultrasound scans compared with only 25% of nonobese women (P<.05). CONCLUSION: In our population, obesity in otherwise uncomplicated pregnant women is associated with increased use of obstetric ultrasound services, but there were no differences in use of other prenatal services.