But the news from Texas wasn't the only bad news for abortion rights that week. Just two days earlier, on May 17, the U.S. Supreme Court announced that it will hear oral arguments on a Mississippi law—currently blocked from going into effect—that would ban abortion after 15 weeks of pregnancy. The news alarmed legal experts and supporters of abortion rights alike, and with good reason. A central tenet of Roe and subsequent Supreme Court decisions has been that states cannot ban abortion before viability, generally pegged at about 24 to 26 weeks of pregnancy. That count includes 11 measures that would ban abortion at different points during pregnancy, often as early as six weeks—before most people even know they are pregnant.