Passed in 2013, the law said clinics providing abortion services must meet the same building standards as ambulatory surgical centers. And it required doctors performing abortions to have admitting privileges at nearby hospitals.

Since the law was passed, the number of clinics providing abortion services in Texas dropped to 19 from 42. Opponents said that number would fall to ten if the Supreme Court upheld the law.

The Center for Reproductive Rights called the law “an absolute sham,” arguing that abortion patients rarely require hospitalization and that many patients simply take two pills.