U.S. Supreme Court Justice Samuel Alito has temporarily put a lower court order imposing significant restrictions on the distribution of the abortion drug mifepristone on hold through Friday night, as the high court considers a request by the administration of U.S. President Joe Biden to block the restrictions.

The order stems from a lawsuit brought by anti-abortion groups and doctors seeking to ban the pill. Here is what you need to know about the case as it continues to unfold.

What is medication abortion?