The U.S. Supreme Court on Monday agreed to rule on the constitutionality of Mississippi’s ban on abortions after 15 weeks, a direct conflict with the justices’ landmark 1973 abortion decision Roe v. Wade.

The case will be the first major abortion challenge heard by the court’s newest justice, Amy Coney Barrett, who succeeded the late Justice Ruth Bader Ginsburg, a staunch defender of women’s reproductive rights.