What to know about placenta accreta

Normally, the placenta separates from the uterus after birth. With placenta accreta spectrum, placental tissue is abnormally attached to, or grows into, the uterine wall and may not separate safely. Previous caesarean birth, other uterine surgery, and a placenta lying low over the cervix can raise concern, but imaging and specialist review are needed to assess an individual pregnancy.

Ultrasound is central to assessment, and MRI may sometimes help clarify the placenta's position and depth. The obstetric team plans the timing, location, blood availability, anaesthesia, and surgical expertise needed for delivery.

Keep all specialist appointments and bring previous caesarean or uterine surgery records if available. Ask where delivery will take place, who will be present, and what the plan is if heavy bleeding occurs. Delivery is often planned by caesarean, and hysterectomy may be recommended when removing the placenta would cause dangerous bleeding. Do not stop prescribed medicines or change activity without instructions from your maternity team.

Contact maternity triage immediately for any vaginal bleeding, painful or regular contractions, leaking fluid, severe abdominal pain, faintness, breathing difficulty, or reduced fetal movement. Call emergency services for heavy bleeding, collapse, or severe weakness. Use the emergency plan provided by your hospital rather than travelling alone.

Ask how confident the imaging diagnosis is, whether the bladder or nearby structures appear involved, when delivery may be planned, and whether preserving the uterus is medically realistic. You can also ask about anaesthesia, blood preparation, newborn care, recovery after surgery, and whom to contact day or night if bleeding begins.