The U.S. Supreme Court¡¯s conservatives suggested they are poised to roll back abortion rights and uphold Mississippi¡¯s ban after 15 weeks of pregnancy, as the court tackled its most consequential reproductive-rights case in a generation.

In an argument that lasted almost two hours, all six Republican-appointed justices indicated they would let states start banning abortion far earlier than the court¡¯s precedents now allow. Under a 1992 ruling, states can¡¯t impose significant obstacles before fetal viability, which the court suggested was around 23 or 24 weeks at the time.

¡°If it really is an issue about choice, why is 15 weeks not enough time?¡± Chief Justice John Roberts asked the lawyer challenging the Mississippi law on behalf of the state¡¯s lone abortion clinic.