What Is the Rationale for Administering Magnesium Sulfate to Mrs. Santos

Mrs. Santos, a 32-year-old Pregnant Woman at 32 Weeks Gestation, Is Admitted to the Antenatal Unit with a Diagnosis of Severe Preeclampsia. She Presents with Severe Headache, Blurred Vision and Epigastric Pain. Her Blood Pressure Is 160/100 Mmhg and Proteinuria Is 3+. the Obstetrician Has Ordered Magnesium Sulfate for Seizure Prophylaxis