The Supreme Court has ruled that states can prevent biological transgender males from participating in girls' sports. This decision, a 6-3 ruling, states that neither Title IX nor the Equal Protection Clause necessitates exceptions for transgender athletes who have undergone hormone therapy. States have the authority to base sports eligibility solely on biological sex. The ruling overturns previous decisions from the Fourth and Ninth Circuits. Approximately 27 states have enacted laws restricting girls' sports to individuals whose biological sex was determined at birth. These laws aim to ensure competitive fairness and safety for biological females. The cases involved athletes challenging laws in Idaho and West Virginia. Idaho's law bans transgender girls and women from participating in school sports, defining eligibility by biological sex. West Virginia's law imposes similar restrictions based on biological sex. Challengers argued these laws discriminate based on sex and transgender status. They also claimed that some transgender athletes do not possess significant competitive advantages. The states argued that their laws classify based on biological sex, a long-accepted practice for fairness and safety. They contended that sex-separated teams are permissible under Title IX. The Court's questioning indicated a leaning towards upholding the state laws, with justices referencing biological differences and state authority.