Objectives We aimed to determine the general prognosis of placenta previa, including low-lying placenta, and the prognosis according to gestational age at planned delivery in Korean mothers. Methods This was a multicentre retrospective cohort study that included singleton women with placenta previa, including a low-lying placenta. Gestational age at planned surgery, gestational age at delivery, emergency Caesarean delivery rates, and adverse maternal and neonatal outcome rates were determined.