Placenta Previa

Placenta previa is a placenta that has grown low in the uterus, partially or fully over the opening to the birth canal (cervix). Placenta previa can be dangerous during labour and delivery, when it is most likely to cause severe placental bleeding that can be life-threatening to the mother or fetus.

The amount of the cervix that is covered by the placenta may be slight (marginal), moderate (partial), or complete (total). Unless a placenta previa is only marginal, a surgical delivery (caesarean section) is needed to prevent severe placental bleeding.

A woman's risk for placenta previa increases with each pregnancy, caesarean section, uterine procedure that scars the uterus, or previous placenta previa. Smoking, cocaine use, and advancing age also increase placenta previa risk.

Is it an emergency?

If you or someone in your care has chest pains, difficulty breathing, or severe bleeding, it could be a life-threatening emergency. Call 9-1-1 or the local emergency number immediately.
If you are concerned about a possible poisoning or exposure to a toxic substance, call Poison Control now at 1-800-567-8911.

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