An abnormal location of the placenta in which it lies low in the uterus and partially or completely covers the cervix. Painless vaginal bleeding may be a warning sign. Placenta previa can cause excessive bleeding that can harm the mother and the baby.
Placenta previa--low attachment of the placenta, covering or very close to the cervix. If the placenta is covering the cervix, a cesarean section may need to be performed.
placental tissue covering the opening of the cervix