What is preeclampsia?
Preeclampsia is a complex disorder that affects 3 to 8 percent of pregnant women. A woman is diagnosed with preeclampsia if she has high blood pressure and protein in her urine after 20 weeks of pregnancy.
(It's possible to have preeclampsia before 20 weeks, but only in rare cases, such as with a molar pregnancy.)
Preeclampsia most commonly shows up after 37 weeks, but it can develop at any time during the second half of pregnancy, including during labor or even after delivery — usually within the first 48 hours.
Preeclampsia can range from mild to severe, and it can progress slowly or rapidly. The only way to get better is to deliver the baby.