Wyoming is the first US state to ban abortion pills, US media report.
Those who "prescribe, dispense, distribute, sell or use any drug for the purpose of procuring or performing an abortion" face up to six months in prison and a fine of up to $9,000.
However, the new provision adds that women "on whom a chemical abortion is performed or attempted will not be prosecuted," says the new law signed by Republican Wyoming Gov. Mark Gordon after it was passed by state lawmakers earlier of the month.