Inclusion criteria :  Pregnant women with one or more of the following:  new-onset cerebral or visual disturbances thrombocytopenia (platelet count <100 000/mL) elevated liver enzymes (transaminases) to twice the normal upper limit; severe persistent pain in the right upper or middle upper abdomen that does not respond to medication and is not explained by another condition renal insufficiency (serum creatinine >97 μmol/L), or a doubling of serum creatinine concentration in the absence of other renal disease systolic blood pressure ≥160mmHg or diastolic blood pressure ≥110mmHg on more than one occasion at least 4 h apart while the patient is on bed rest (unless antihypertensive therapy had been initiated before this time).  Exclusion Criteria:  Age below 18 yr SP during the postpartum period refusal to participate to the study. history of cardiac or respiratory disease patients with clinical manifestations of pulmonary edema