What is mifepristone at center of Supreme Court battle?
Mifepristone is a drug typically used in combination with another drug, misoprostol, to induce an abortion or to help manage an early miscarriage.
The medication works by blocking progesterone, a hormone that the body needs to continue a pregnancy.
This causes the uterine lining to stop thickening and to break down, detaching the embryo. The second drug, misoprostol, taken 24 to 48 hours later, causes the uterus to contract and dilates the cervix, which will expel the embryo.
However, the World Health Organization says the two drug-regiment can be taken up until the 12-week mark of pregnancy.