Preeclampsia is a disease characterized by vascular endothelium dysfunction and vasoconstriction typically occurring after 20 weeks of pregnancy and potentially persisting for 4 to 6 weeks postpartum. Reduced placental perfusion due to shallow cytotrophoblast migration towards uterine spiral arterioles is believed to be the main cause. severe preeclampsia is a serious pregnancy complication characterized by high blood pressure (systolic blood pressure of 160 mm Hg or higher, or diastolic blood pressure of 110 mm Hg or higher) and damage to organs such as the kidneys and liver. It may also involve symptoms such as low platelet count, severe headaches, visual disturbances, impaired kidney function, liver dysfunction, pulmonary edema, and upper abdominal pain. If left untreated, it can lead to life-threatening complications for both the mother and the baby. Magnesium sulfate is considered as a recommended treatment for women experiencing severe preeclampsia or eclampsia by WHO. Doppler ultrasound plays a crucial role in identifying obstetric complications related to utero-placental insufficiency, which can have significant impacts on both mother and fetus throughout pregnancy and delivery.