Clinics in Arkansas began canceling medical abortions Tuesday. The law, which heavily restricts abortion by medication, is threatening two of the state's three facilities that perform abortions.
The bill would make most abortions illegal after a fetal heartbeat can be detected. Republican Gov. Kim Reynolds has not said whether she will sign the measure.
The state recently passed the most restrictive abortion ban in the country, and advocates are now challenging a slate of other laws and regulations restricting the procedure.