If the Supreme Court reverses the ruling in Roe v. Wade, as the leaked opinion indicated, restrictions on abortion will be left up to individual states. According to the Guttmacher Institute, abortion access will remain the same in 16 states, as those states have laws protecting abortion rights.
23 states will ban abortion immediately after Roe is overturned for various reasons. 13 of those states have “trigger laws,” which are written to take effect once the Supreme Court‘s ruling changes. 9 of them have abortion bans from before Roe, which would also become active.
Another set of 9 states have recently passed abortion bans and restrictions, which are being held up in court. Those would take effect if the precedent gets reversed. If Roe is repealed, states like Montana, Nebraska, Indiana and Florida appear ready to pass similar legislation restricting access to abortion.