Preeclampsia is a pregnancy complication characterized by high blood pressure and signs of degeneration of liver and kidneys. Preeclampsia usually begins after 20 weeks of pregnancy in women whose blood pressure had been normal. Even a slight rise in blood pressure may be a sign of preeclampsia. If left undetected, preeclampsia can lead to serious/fatal complications for both you and your baby. If you have preeclampsia, the only cure is delivery of your baby.