 - Case group: Women hospitalized for pre-eclampsia after 20 07 weeks of gestation. The diagnosis of preeclampsia include a combination of the following criteria: after 20 weeks of pregnancy in a previously normotensive woman, a diastolic blood pressure 90 mmHg recorded twice at least four hours apart or 110 mmHg, with proteinuria 300 mg24h or 30 mg mmol protein urinary creatinine in a urine sample or factor s serious maternal fetal according to consensus SOGC. 