The largest human rights defence organisation in the United States, the ACLU, promised to file a lawsuit to block its implementation, although the bill's backers have expressly said they want to bring the case to the Supreme Court.
Now that the court has a conservative majority in the wake of President Donald Trump's election, some Republicans want it to overturn the landmark 1973 Roe v Wade ruling that recognised women's right to abortion.
"You're saying to my daughter you don't matter in the state of Alabama... It's ok for men to rape you and you're gonna have his baby if you get pregnant," he added, his voice sometimes breaking with emotion.
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