Dozens of protesters on both sides of the ideological aisle gathered outside the Supreme Court on Monday as justices began deliberations over the Texas abortion law that could lead to Roe v. Wade being overturned.

The Supreme Court concluded its first round of discussions over the Texas Heartbeat Act, which went into effect on Sept. 1 after justices decided not to act on an emergency appeal to block enforcement of the measure. The law has been criticized by pro-abortion rights advocates and providers for having a chilling effect on the constitutional right to abortion established under Roe, while proponents of the law argue its provisions allow for abortion procedures before six weeks of gestation.