Defining Male and Female Act of 2024

This bill defines "sex," "male," and "female" in federal law based on biological characteristics present at birth, specifically referencing reproductive anatomy (e.g., sperm production for males, egg production for females). It mandates that all federal agencies, courts, and laws interpret these terms strictly according to this biological definition, excluding self-identification or gender identity. The bill directly affects how federal programs, regulations, and legal decisions interpret terms like "sex," "gender," and "gender identity" in all federal contexts. Key provisions clarify that "gender" refers only to biological sex differences and explicitly states that gender identity does not override these definitions.