The case is the first to come before the Supreme Court testing the constitutionality of laws barring transgender teens from certain gender-affirming treatments.

The wide-ranging argument at the Supreme Court touched on the approaches of other nations, the relevance of a previous ruling protecting transgender workers from workplace discrimination and the rights of parents.

Hearing a high-profile culture-war clash, the Supreme Court on Wednesday seemed likely to uphold Tennessee’s ban on gender-affirming care for minors.