President Donald Trump’s appointment of Judge Brett Kavanaugh to the U.S. Supreme Court has raised the prospect that a new conservative court majority might consider overturning or weakening the 1973 Roe v. Wade ruling establishing a nationwide right to abortion.

Four states — Louisiana, Mississippi, North Dakota and South Dakota — already have laws designed to prohibit most abortions if the Roe ruling were overturned.

Several other states have laws adopted before the Roe ruling that ban many abortions and that have not been removed from their statutes. It’s unclear whether those laws automatically would take effect if the Roe precedent were overturned. Some state courts also have ruled that abortion rights are protected under their state’s constitution.

Here’s a look at some states with old abortion laws still on the books or with newer laws that could be triggered if Roe were reversed: