Main findings
The women who had pernicious placenta previa in the subsequent pregnancy
after first cesarean delivery, had a higher frequency of severe outcomes
including placental implantation (47.5%), massive bleeding (55.8%) and
hysterectomy (10.4%). The examination of ultrasound combined with MRI
improved the prediction of placenta implantation in these patients.
Finally, we showed that vascular occlusion had no effect on the
occurrence of severe hemorrhage and hysterectomy.