The Supreme Court has rejected appeals from Mississippi and Wisconsin seeking to put in place restrictions on abortion clinics that were struck down by lower courts.
The justices on Tuesday refused to hear appeals involving laws that would have forced doctors who perform abortions at clinics in the two states to have admitting privileges at nearby hospitals.
The orders follow Monday's decision in which the court struck down a similar provision in Texas.
Federal appeals courts in Chicago and New Orleans earlier ruled against the states.
Mississippi's law would have closed the lone abortion clinic in the state, in Jackson.
The cases are Currier v. Jackson Women's Health Organization, 14-997, and Schimel v. Planned Parenthood, 15-1200.