Preeclampsia, a narrowing of the blood vessels, is a dangerous condition unique to pregnancy. Because of this narrowing, women with preeclampsia can have decreased blood flow to the kidneys, brain, liver, retina, and placenta. In the United States, preeclampsia is the leading cause of both fetal complications and maternal and fetal death. Symptoms of preeclampsia include high blood pressure, swelling of the hands and face, and protein in the urine. Some risk factors for the condition include chronic high blood pressure and obesity prior to pregnancy, as well as having developed high blood pressure or preeclampsia during a previous pregnancy. The only definite cure for preeclampsia is delivering the fetus.