The bishops submitted an amicus brief on Sept. 18 urging the Supreme Court to uphold state bans on biological men participating in women’s sports. The United States Conference of Catholic Bishops (USCCB) has joined legislatures, scientists, female athletes, the U.S. Department of Justice, and dozens of advocacy groups to support the protection of women’s sports. The bishops submitted an amicus brief on Sept. 18 urging the Supreme Court to uphold state bans on biological men participating in women’s sports. “These cases ask whether the Equal Protection Clause or Title IX forbids the states to create female-only athletic competitions,” the bishops wrote. “That is because allowing such competition would undermine fundamental Catholic teachings regarding the immutable, God-given differences between the sexes.”