Placenta Previa Facts

What causes placenta previa?

The cause of placenta previa is unknown, but like placental abruption, a condition in which the placenta separates from the uterine wall, it's more common among women who smoke, use cocaine, or are over age 35. Women are also at increased risk if they've had previous uterine surgery, including a c-section, a D&C (dilation and curettage, in which the lining of the uterus is scraped) following a miscarriage, an abortion, or if they are carrying twins (or a higher number of multiples).

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