Patients
This study included patients who delivered after 34 weeks of gestation and were managed for RPOC at Kindai University Hospital from January 2013 to March 2022. Participants were divided into two groups: those who underwent MROP within 24 hours of delivery and those who were managed conservatively without MROP. Patients with RPOC who delivered before 20 weeks of gestation and did not undergo uterine artery embolization (UAE) were also included to evaluate serial changes in serum human chorionic gonadotropin (hCG) levels. This study was approved by the ethical review board of Kindai University (Approval number: R04-166).