Groups opposed to this year’s version of the personhood amendment kicked off their campaign with a rally at the state Capitol Tuesday.
Amendment 67 would give embryos and fetuses legal standing in Colorado’s criminal code, a change amendment supporters say is necessary to punish people who cause miscarriages through an accident or assault.
It's also called the Brady Amendment, after the unborn baby who died after his mother was hit by a drunken driver.
Opponents are vowing to defeat the measure they say would ban abortion and commonly used forms of birth control, like the Pill.
Supporters of the amendment argue it would also protect expectant mothers, but Christina Aguilar with the Colorado Organization for Latina Opportunity and Reproductive Rights calls that argument deceptive.
"It would actually do the opposite," Aguilar said. "It would criminalize women and outlaw all abortion."