Defining Male and Female Act of 2024

This bill codifies biological definitions of sex in federal law, defining "male" and "female" based on reproductive anatomy (sperm-producing vs. egg-producing systems) as determined at birth. It requires federal agencies and laws to interpret terms like "sex," "male," and "female" according to these biological definitions, explicitly stating that gender identity does not equate to sex. The bill directly affects how federal agencies and programs interpret these terms in existing laws, regulations, and policies, including those related to facilities, sports, and equal treatment. It does not create new programs but mandates that federal interpretations align with these biological definitions, excluding gender identity from the definition of sex or gender.