Iowa Republicans are backing legislation banning abortions once heartbeat is detected.

An AP report from Tuesday coming out of Des Moines, Iowa shows that state Republicans are backing legislation that is intended to ban abortions once a fetal heartbeat is detected. The news has stirred controversy among Democrats as they have proposed to stage an all-nighter in filibuster form to halt an initial procedural vote.

AP:

A GOP-led House committee was scheduled to vote Tuesday to add the provision to an abortion bill. The provision could ban abortions as early as six weeks in a pregnancy. It would be the strictest ban in the U.S. and would face legal challenges. Ohio Gov. John Kasich vetoed a similar measure late last year. In January 2016, the U.S. Supreme Court refused to review lower court rulings overturning North Dakota’s so-called fetal heartbeat law.

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The bill would have to be approved by both chambers, which is controlled by GOP lawmakers before the bill is to reach the state’s Republican governor Terry Branstad.

Ohio Governor John Kasich vetoed a measure with a similar proposition late last year and in January of 2016 the U.S. Supreme Court failed to review rulings from North Dakota’s lower courts that overturned their ‘fetal heartbeat’ law as well.

An original bill that left out the fetal heartbeat amendment would have abortions at 20 of pregnancy weeks banned.