The Texas Supreme Court on Friday night put on hold a judge’s ruling that approved an abortion for a pregnant woman whose fetus has a fatal diagnosis, throwing into limbo an unprecedented challenge to one of the most restrictive bans in the U.S.

The order by the all-Republican court came more than 30 hours after Kate Cox, a 31-year-old mother of two from the Dallas area, received a temporary restraining order from a lower court judge that prevents Texas from enforcing the state’s ban in her case.

In a one-page order, the court said it was temporarily staying Thursday’s ruling “without regard to the merits.” The case is still pending.

“While we still hope that the Court ultimately rejects the state’s request and does so quickly, in this case we fear that justice delayed will be justice denied,” said Molly Duane, an attorney at the Center for Reproductive Rights, which is representing Cox.

Cox’s attorneys have said they will not share her abortion plans, citing concerns for her safety. In a filing with the Texas Supreme Court on Friday, her attorneys indicated she was still pregnant.

Cox was 20 weeks pregnant this week when she filed what is believed to be the first lawsuit of its kind since the landmark U.S. Supreme Court ruling last year that overturned Roe v. Wade. The order issued Thursday only applied to Cox and no other pregnant Texas women.

Cox learned she was pregnant for a third time in August and was told weeks later that her baby was at a high risk for a condition known as trisomy 18, which has a very high likelihood of miscarriage or stillbirth and low survival rates, according to her lawsuit.

Furthermore, doctors have told Cox that if the baby’s heartbeat were to stop, inducing labor would carry a risk of a uterine rupture because of her two prior cesareans sections, and that another C-section at full term would would endanger her ability to carry another child.

Republican Texas Attorney General Ken Paxton argued that Cox does not meet the criteria for a medical exception to the state’s abortion ban, and he urged the state’s highest court to act swiftly.

“Future criminal and civil proceedings cannot restore the life that is lost if Plaintiffs or their agents proceed to perform and procure an abortion in violation of Texas law,” Paxton’s office told the court.