Only three days after a federal judge blocked a new Texas law that threatened to shut down many of the state’s abortion clinics, the United States Court of Appeals for the Fifth Circuit, in New Orleans, reversed the decision, saying the rule should take effect while the case is argued in the months to come.

Abortion clinic owners and women’s health advocates said the decision would have catastrophic effects because as many as 13 of the 36 clinics providing abortions in the state would have to stop doing so immediately, forcing women in large swaths of Texas to travel several hours on at least two days to obtain abortions.

The clinics forced to halt abortions have been unable to satisfy a new requirement, part of a broader anti-abortion law adopted in July, that doctors performing the procedure must have formal admitting privileges at a hospital within 30 miles of the clinic.

Greg Abbott, the state attorney general and a Republican candidate for governor next year, filed an emergency appeal to the three-judge circuit court on Monday asking it to overrule the lower court. He said in a statement Thursday, “This unanimous decision is a vindication of the careful deliberation by the Texas Legislature to craft a law to protect the health and safety of Texas women.”