Mifepristone is a medication primarily used to terminate early pregnancies. It works by blocking the hormone progesterone, which is essential for maintaining a pregnancy. Typically, it is taken in combination with another medication called misoprostol to complete the abortion process. In addition to its use in abortion, Mifepristone has been studied for treating conditions like Cushing's syndrome and certain types of uterine fibroids. It is important to use this medication under medical supervision to ensure safety and effectiveness.