UPDATE, May 20, 5:16 p.m.: Oklahoma Gov. Mary Fallin (R) on Friday afternoon vetoed the state GOP’s total abortion ban, according to a report from CNN. 

An unprecedented measure to make providing abortion care a felony punishable by up to three years in prison now awaits the signature of Oklahoma Gov. Mary Fallin (R).

The GOP-backed SB 1552 outlaws abortions except to save the patient’s life. Physicians who perform abortions in other cases will lose their medical licenses and would be unable to obtain or renew a license.

The bill’s backer, Sen. Nathan Dahm (R-Broken Arrow), reportedly said he hoped the legislation might spur an overturn of Roe v. Wade, the landmark Supreme Court decision that legalized abortion nationwide.

The governor has five days to sign the measure before it automatically becomes law, according to reports. Her representative told the Associated Press on Thursday that Fallin is withholding comment until her staff has time to review the anti-choice legislation.

With no discussion or debate, the state’s Republican-dominated state senate on Thursday voted for the bill 33-12, as the Associated Press reported, with a handful of Republicans joining Democrats in opposition.

State Sen. Ervin Yen (R-Oklahoma City), the only physician in the chamber, described the abortion ban as “insane” and voted against it.

Officials from the Center for Reproductive Rights (CRR) and the state medical association called the legislation, the first of its kind, unconstitutional.

Amanda Allen, the center’s senior state legislative counsel, called on the Oklahoma governor in a statement to “reject this cruel and unconstitutional ban.”

Fallin’s signature on the measure could set up an expensive legal fight.

CRR officials have challenged what it described as unconstitutional restrictions on reproductive health care in Oklahoma eight times in five years, according to a statement released Thursday. Those restrictions include measures to impose a forced 72-hour delay before a person can receive abortion care, and to outlaw the most common method of second-trimester abortion.

Federal courts have blocked similar Republican-led attempts to ban abortion care in other states. The Supreme Court this year refused to review the North Dakota GOP’s ban on abortion care as early as six weeks of pregnancy, as well as Arkansas’ ban on abortion at 12 weeks of pregnancy.