Cervical cerclage when you have placenta previa

Placenta previa means the placenta lies low in the uterus and covers or approaches the cervical opening. Cerclage is a suture placed around the cervix when there is concern that the cervix may open too early. One does not correct the other, although both can influence pregnancy monitoring and birth planning.

Bleeding can occur with placenta previa and may change whether an examination or procedure is appropriate. A specialist therefore reviews ultrasound findings, the degree and pattern of bleeding, cervical length or opening, contractions, membrane status and pregnancy history before discussing cerclage.

Make sure every clinician involved knows that the placenta is low before a vaginal examination or cervical procedure. Attend scheduled ultrasound reviews so the team can reassess placental position and the cervix. If a stitch is being considered, ask why it is being proposed, how bleeding risk will be managed, what anaesthesia is planned and what observation will follow.

Follow personalised instructions about activity, intercourse, medicines and when to attend maternity triage. Do not insert anything into the vagina or perform a self-check during an episode of bleeding.

Seek urgent maternity care for any vaginal bleeding when you have placenta previa, even if it causes no pain or stops. Call emergency services for heavy bleeding, faintness, marked weakness, breathing difficulty or collapse. Also contact the maternity unit promptly for contractions, pelvic pressure, abdominal pain, fever, reduced fetal movement or a gush or trickle of fluid.

Ask whether the concern is cervical weakness, preterm labour risk or another finding; where the placental edge sits in relation to the cervix; and how recent bleeding affects the plan. Request clear instructions for reaching the maternity unit day or night and ask how both conditions may shape the timing and route of birth.