Placenta Accreta occurs when the placenta attaches too deep in the uterine wall but it does not penetrate the uterine muscle. Placenta accreta is the most common accounting for approximately 75% of all cases.
The specific cause of placenta accreta is unknown, but it can be related to placenta previa and previous cesarean deliveries. Placenta accreta is present in 5% to 10% of women with placenta previa.
A cesarean delivery increases the possibility of a future placenta accreta, and the more cesareans, the greater the increase. Multiple cesareans were present in over 60% of placenta accreta cases.
Premature delivery and subsequent complications are the primary concerns for the baby. Bleeding during the third trimester may be a warning sign that placenta accreta exists, and when placenta accreta occurs it commonly results in a premature delivery. Your healthcare provider will examine your condition and use medication, bed rest and whatever else necessary to help continue the pregnancy towards full term.
The placenta usually has difficulty separating from the uterine wall. The primary concern for the mother is hemorrhaging during manual attempts to detach the placenta. Severe hemorrhaging can be life threatening. Other concerns involve damage to the uterus or other organs (percreta) during removal of the placenta. Hysterectomy is a common therapeutic intervention, but the results involve the loss of the uterus and the ability to conceive.