Results
During the four-year period (2015-2018), there were 3,755,798 para 2 women who delivered non-anomalous, singleton live-births at 22-44 weeks’ gestation in the US (eTable 1 ). The overall caesarean rate was 29.9%, and more than two-thirds of these caesareans were performed prelabour. Compared to AGA births (29.6%), the caesarean delivery rates were higher for SGA <5th percentile (34.3%) and SGA <3rd percentile (36.4%). The cohort was predominantly college educated, normal weight Caucasian women.