Abortion in Oklahoma is legal under United States law, following the decision in Roe v. Wade in 1973. In 1992, the Supreme Court case Planned Parenthood v. Casey upheld the legality of abortion but granted states permission to create restrictions, so long as they did not create an "undue burden" for women who sought abortion.
In 2016, Oklahoma legislators approved Senate Bill 1118, which would criminalize abortion providers and charge them with first degree murder. The felony would be punishable by up to three years imprisonment, and the doctor would lose their medical license. Critics denounce the bill as breaking federal law that permits women to seek an abortion. If enacted, opponents of the measure have promised to challenge its constitutionality in the courts. On May 20, 2016, Governor Mary Fallin vetoed the bill before it could become law, citing its wording as too vague to withstand a legal challenge.