Legislation introduced in the Michigan House would generally prohibit doctors from performing abortions after a woman's 20th week of pregnancy.
The legislation introduced last week by Republican Rep. Eileen Kowall of Oakland County's White Lake Township is similar to laws approved in a handful of other states in the past few years.
Supporters say the proposals are based on the premise that a fetus can feel pain at 20 weeks, a claim that opponents dispute.
Opponents also say the proposals are a departure from Roe v. Wade, which lets states limit abortions in cases where there's a viable chance the fetus could survive outside of the womb. That's generally considered to be 22 and 24 weeks.
The Michigan proposal would provide exceptions for when the mother's life is at risk.