By a 5-3 vote, the justices rejected the state's arguments that its 2013 law and follow-up regulations were needed to protect women's health. The rules required doctors who perform abortions to have admitting privileges at nearby hospitals and forced clinics to meet hospital-like standards for outpatient surgery.

The clinics that challenged the law argued that it was merely a veiled attempt to make it harder for women to get abortions by forcing the closure of more than half the roughly 40 clinics that operated before the law took effect.

Justice Stephen Breyer's majority opinion for the court held that the regulations are medically unnecessary and unconstitutionally limit women's right to abortions.