Influence of gestational weight gain and BMI on cesarean delivery risk in adolescent pregnancies

Objective: Obesity and excessive gestational weight gain (GWG) increase cesarean delivery (CD) risk; however, their influence on teen pregnancies is less clear. We describe the influence of GWG and pre-pregnancy body mass index (BMI) on primary CD (PCD) risk in adolescent compared with adult pregnancies. Study Design: Population-based cohort study of Ohio births (2006 to 2012), n =1 034 552. Analyses were limited to 251 398 singleton live births in term (37 to 42 weeks) primiparas. Multivariate logistic regression estimated the association between BMI, GWG and CD risk in teens compared with adults (20 to 34 years), adjusting for maternal race, smoking status and labor induction. Results: The primary cesarean rate (PCD) for primiparous women was 25.6%. It was lower for adolescents (17%