The goal of this observational study is to learn about the effects of the different drug regimens of magnesium sulphate in treatment of (severe pre-eclampsia). This condition affects some pregnant women and raises their blood pressure. It may also cause seizures (fits). The medication (magnesium sulphate) helps to prevent seizures. The main question this study aims to answer is: What are the different regimens of magnesium sulphate that are used to prevent seizures in pregnant women with severe pre-eclampsia? Participants already have taken the magnesium sulphate as part of their regular medical care for severe pre-eclampsia. Researchers will look into the records of the participants in the past 5 years to collect the data.