RU-486, also known as mifepristone, is a medication used to terminate early pregnancies. It works by blocking the hormone progesterone, which is essential for maintaining a pregnancy. When taken in combination with another medication called misoprostol, it effectively induces a miscarriage within the first ten weeks of gestation. Approved for use in many countries, RU-486 is considered safe and effective when used under medical supervision. It is typically prescribed by healthcare providers and requires follow-up appointments to ensure the procedure is complete. This medication has played a significant role in reproductive health and women's rights.