WASHINGTON (CBS News) — The Supreme Court on Friday overturned its landmark decision in Roe v. Wade that established the right to an abortion, with a ruling that marks a seismic shift in abortion law and will usher in new rules limiting or banning access to the procedure half of the states, in some places immediately.

The decision to undo nearly 50 years of precedent will have sweeping ramifications for tens of millions of women across the country as abortion rights are curtailed, particularly in GOP-led states in the South and Midwest, and lead to a patchwork of laws absent the constitutional protection. Thirteen states have so-called “trigger laws” on the books, in which abortion will swiftly be outlawed in most cases with Roe overturned.

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The ruling came in a case involving a Mississippi law that banned abortions after 15 weeks of pregnancy, and the court reversed the decision of the 5th U.S. Circuit Court of Appeals, which blocked the measure.

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Justice Samuel Alito delivered the opinion for the court, and was joined by Justices Clarence Thomas, Neil Gorsuch, Brett Kavanaugh and Amy Coney Barrett. Chief Justice John Roberts delivered a concurring opinion. The court’s three liberal justices dissented.

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