Late-preterm infants, early-term infants, and timing of elective deliveries; current status in a Korean medical center.

Objective: The aim of this study was to examine the current perinatal outcomes among infants born late-preterm and early-term compared to those born full-term and evaluate the optimal gestational age for delivery.

Methods: We performed a retrospective cohort study for births occurred at Seoul St. Mary's Hospital over the past 7 years.