GOP presidential hopeful Walker signs abortion ban bill

The governor's signature makes Wisconsin the 15th state to pass a ban on abortion at 20 weeks. There is no exception for pregnancies resulting from rape or incest.

Walker's signing of the bill comes just nine months after he ran a television ad during his gubernatorial re-election campaign where he said whether to obtain an abortion is a decision between a woman and her doctor.

The new law — which cleared the Republican controlled Legislature without any Democratic support — is expected to be challenged in court.

Under the new law, doctors who perform an abortion at or after 20 weeks in non-emergency situations could be charged with a felony punishable by up to $10,000 in fines and 3 years in prison. Doctors could also be sued for damages.

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Doctors would be allowed to perform abortions beyond 20 weeks only if the mother is likely to die or suffer irreversible injuries within 24 hours.

The law's supporters say fetuses can feel pain after 20 weeks. They say the ban will spare those unborn children an excruciatingly painful death. The American Congress of Obstetricians and Gynecologists, however, says fetuses can't feel pain until the third trimester starts at 27 weeks. Minority Democrats have complained that Republicans should leave women alone and let them decide how to handle their own bodies.

Abortions after 20 weeks are rare in Wisconsin. According to the most recent state Department of Health Services information, 89 of nearly 6,500 abortions performed in Wisconsin in 2013, or roughly 1 percent, occurred after the 20-week mark.

The U.S. Supreme Court's 1973 Roe v. Wade decision established a nationwide right to abortion but allowed states to restrict the procedures after the fetus reaches viability, the point where it could survive outside the womb. The ruling offered no legal definition of viability but said it could range from the 24th to 28th week of pregnancy.

Courts have blocked bans in Georgia, Idaho and Arizona. Litigation in other states is ongoing. A federal appellate court in May struck down Arkansas' ban on abortions after the 12th week of pregnancy if a doctor can detect a fetal heartbeat, finding that prohibition unconstitutionally burdens women.