In a federal trial earlier this year, attorneys for 28 death row inmates argued the method could violate the amendment prohibiting cruel and unusual punishment.
Oklahoma now becomes the first state in the nation to effectively end availability of the procedure.
If Gov. Kevin Stitt signs the bill, the legislation would go into effect immediately.
The bill signing comes on the heels of a leaked draft opinion from the U.S. Supreme Court that it is considering weakening or overturning the landmark Roe v. Wade decision.
Oklahoma Gov. Kevin Stitt signed a bill explicitly prohibiting the use of nonbinary gender markers on state birth certificates, a ban experts say is the first of its kind in the nation.
It's the latest conservative legislature to approve a new restriction on abortion, as the country awaits a Supreme Court decision that could upend Roe v. Wade.
The state's Republican-controlled House gives final legislative approval to a bill that would make performing an abortion a felony, punishable by up to 10 years in prison.
Oklahoma Gov. Kevin Stitt commuted the death sentence of Julius Jones after a public outcry. Jones, who maintains he was wrongly convicted of a 1999 murder, now faces life in prison without parole.
Eighty-year-old Glenda Parton's vehicle was found abandoned near Tulsa last Tuesday after she was searching for her son and his friend who also had gone missing.
The lawsuit argues that Oklahoma's law banning lessons on gender and race interferes with students' and educators' First Amendment right to learn and talk about those issues in school.