Placenta accreta diagnosis by ultrasound: what to know

During an ultrasound, clinicians assess the placenta's position, its relationship with the cervix and the appearance of the area between the placenta and uterine wall. They may also assess nearby tissues and blood flow for patterns that suggest unusually deep attachment.

A scan can be reassuring, inconclusive or suspicious. It cannot always show the full depth of placental attachment, and the result is interpreted alongside previous caesarean births, uterine surgery, bleeding and other findings. A concern on a scan is a reason for expert review, not a final diagnosis by itself.

Ask whether the scan was performed or reviewed by someone experienced in placental imaging and whether a repeat or more detailed scan is useful. Keep follow-up appointments so the placenta's position and pregnancy progress can be reassessed. Bring details of previous operations and any bleeding to each visit.

If concern remains, your team may arrange birth at a hospital with surgical, anaesthetic, blood-bank and newborn support. The plan may include a caesarean section, and hysterectomy may be discussed if the placenta cannot safely be separated after birth.

An ultrasound appointment should not delay help for symptoms. Contact your maternity unit urgently for vaginal bleeding, painful contractions, fluid leakage or reduced fetal movement. Seek emergency assistance for heavy bleeding, faintness, severe weakness, chest discomfort or trouble breathing.

Ask what was seen, where the placenta is relative to the cervix, whether the uterine wall and nearby tissues were clearly assessed, and whether specialist review is recommended. Ask how the result changes delivery timing, hospital choice and possible surgery.