The placenta has invaded entirely through the myometrium and possibly into other organs or tissues outside of the uterus.

The vessels of the placenta are covering the cervical os so a cesarean section is recommended.

The chorionic villi of the placenta have invaded into the myometrium.

The placenta has imbedded into the lining of the uterus and, if caught early, the client may be able to avoid a hysterectomy.