What are the symptoms of placenta accreta?

Only at delivery: There are no symptoms during the pregnancy. Accreta presents with a placenta that will not detach after the infant is born. If the placenta is manually removed or removed under traction there is a great deal of bleeding, which may require surgery and possibly a hysterectomy. Accretas can sometimes be diagnosed prior to delivery via ultrasound or mri.

Vaginal bleeding.: Placenta accreta is a post-hoc diagnosis made after autopsy (if you are unlucky and it was undiagnosed until delivery), or after pathological examination of the uterus and placenta en bloc (if you are lucky and it was suspected and managed appropriately in a tertiary care center with expert doctors, ICU and large blood bank). It is typically asymptomatic, although it can cause vaginal bleeding.