Transgender student brought action against school district and its superintendent for violations of Title IX and the Equal Protection Clause for discriminating against student and all transgender female students, based on Indiana statute that prohibited her from participating on girl’s softball team. The State of Indiana intervened. Student moved for preliminary injunction to enjoin enforcement of statute, Indiana and student moved to exclude expert opinions offered by the other, and Indiana filed motion for leave to file brief of amici curiae on behalf of five female athletes.