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.

Dozens of transgender people, along with their families and allies, gathered outside the Supreme Court on Wednesday as the justices considered a Tennessee law banning access to puberty blockers and hormone therapy for trans minors.

The conservative-majority Supreme Court appeared likely to uphold Tennessee’s ban on transgender-affirming health care for minors as it heard the most high-profile case of its term on Wednesday.