Endpoint
Clinical data from patients’ electronic medical records was reviewed
retrospectively. The following variables were investigated: gestational
weeks and mode of delivery, RPOC diameter at diagnosis, blood flow in
RPOC, bleeding, infection, UAE, MROP, TCR, dilatation and curettage
(D&C), hysterectomy, blood transfusion, the onset of heavy bleeding,
date of RPOC disappearance, and serum hCG levels. We defined ”heavy
bleeding” as bleeding accompanied by a change in vital signs; ”moderate
bleeding” as normal menstrual blood loss; and ”light bleeding” as minor
blood loss. Spontaneous resolution was defined as RPOC disappearance
without removal of the placenta which confirmed by ultrasound or
hysteroscopy.