# Plain Language Summary: Defining Male and Female Act of 2025

This bill would establish how the federal government defines the terms "male," "female," "sex," and related words across all federal laws, regulations, and policies. Right now, different federal agencies sometimes use different definitions, which can create confusion. This bill would create one standard definition that applies everywhere in federal law. According to the bill, "male" would mean someone with a reproductive system that produces sperm (determined at conception), and "female" would mean someone with a reproductive system that produces eggs (also determined at conception). These definitions would be considered fixed and unchangeable.

The bill also specifically addresses "gender identity," which it defines as an internal sense of self that's separate from biological sex. The bill states that the federal government would not recognize gender identity as a replacement for sex in any federal law or policy. This means that for purposes of federal programs, benefits, regulations, and rules, a person's sex would be determined solely by their biological reproductive characteristics at birth, not by how they identify.

The practical effects of this bill would be far-reaching. It could impact how federal agencies handle everything from healthcare programs to military service to civil rights protections to sports eligibility in schools that receive federal funding. Any federal law or program that currently uses sex-based categories or recognizes gender identity would need to align with these biological definitions. This could affect transgender individuals' access to certain federal benefits, how agencies process documents, and how civil rights laws are interpreted and enforced. The bill would essentially lock federal policy into one biological framework for determining sex across all government operations.