Health researchers and reproductive medicine experts challenge a controversial report alleging high complication rates tied to mifepristone, warning that flawed data could distort public understanding and national policy debates.
In the midst of a court battle over whether to continue to allow access by mail to the medication abortion pill mifepristone, Republican lawmakers have claimed that 10% or more of women who take the drug have serious side effects. A 2025 report from an anti-abortion group that put forward the figure has been criticized by reproductive health researchers for methodological issues and a lack of transparency about its data source.
Peer-reviewed studies show a far lower rate of serious problems.
Republicans cited the statistic last week while discussing court rulings on medication abortion. The Louisiana-based 5th U.S. Circuit Court of Appeals halted access to mifepristone by mail on May 1, but the Supreme Court temporarily restored access on May 4 for a week. On May 11, the court extended its order through May 14.
“Mifepristone sends 1 in 10 women who use it to the emergency room with life threatening conditions,” Sen. Josh Hawley of Missouri wrote in a May 4 post on X, calling on Congress to ban the drug when used for abortion.
Rep. Riley Moore of West Virginia in an X post that same day called the drug “extremely dangerous” while referring to a thread from a year prior that claimed “1 in 10 women had dangerous complications like sepsis or hemorrhaging,” based on an April 2025 report from the Ethics and Public Policy Center, a conservative nonprofit that opposes abortion.

