- Federal agenciesCreates a single, uniform federal definition of sex intended to reduce interpretive ambiguity across agencies.
- Potential benefitMay preserve sex-based distinctions in programs and policies described as protecting sex-specific rights or opportuniti…
- Potential benefitCould simplify enforcement for some agencies by providing a concrete statutory standard to apply.
Defining Male and Female Act of 2025
Referred to the House Committee on the Judiciary.
The bill adds a new section to Title 1, Chapter 1 of the U.S. Code that defines terms including "sex," "male," "female," "man," "woman," "boy," "girl," "father," "mother," and "gender identity." It defines sex as an individual's immutable biological classification determined "at conception," assigns female and male by reproductive systems producing eggs or sperm, and states gender identity is subjective and shall not replace sex for federal purposes. The definitions are intended to guide the meaning of any Act of Congress, and federal rules, interpretations, and regulations.
Progressive: emphasizes harm to transgender and intersex people
Relative to its intended legislative type, this bill is a clear, direct statutory effort to establish uniform federal definitions of 'sex' and related terms by amending chapter 1 of title 1, U.S. Code.
The bill adds a new section to Title 1, Chapter 1 of the U.S. Code that defines terms including "sex," "male," "female," "man," "woman," "boy," "girl," "father," "mother," and "gender identity." It defines sex as an individual's immutable biological classification determined "at conception," assigns female and male by reproductive systems producing eggs or sperm, and states gender identity is subjective and shall not replace sex for federal purposes.
The definitions are intended to guide the meaning of any Act of Congress, and federal rules, interpretations, and regulations.
Broad, ideologically charged federal redefinition with high litigation risk and little compromise language makes enactment unlikely.
Relative to its intended legislative type, this bill is a clear, direct statutory effort to establish uniform federal definitions of 'sex' and related terms by amending chapter 1 of title 1, U.S. Code. It specifies textual definitions and broad applicability but omits practical implementation details, edge-case handling, fiscal acknowledgement, and oversight mechanisms.
Progressive: emphasizes harm to transgender and intersex people
Who stands to gain, and who may push back.
These are examples from the analysis, not a ranked list of the most-affected groups.
- Federal agenciesWould likely reduce federal recognition of transgender individuals' gender identities across benefits and anti-discrimi…
- Potential burdenCould trigger increased litigation as courts and agencies interpret conflicts between this statute and existing civil r…
- Federal agenciesMay require federal agencies to revise rules, forms, and databases, creating administrative and compliance costs.
Why the argument around this bill splits.
Progressive: emphasizes harm to transgender and intersex people
Likely strong opposition.
The text explicitly rejects gender identity as a basis for federal recognition and fixes sex at conception, which activists and civil-rights advocates view as erasing transgender people under federal law.
Many impacts (health care access, anti-discrimination protections, benefits, sports, data collection) are plausible but somewhat speculative depending on implementing regulations and litigation.
Mixed view.
Appreciates clearer statutory definitions but worries about administrative complexity, unintended conflicts with existing laws and agency rules, and likely litigation.
Would seek technical fixes, transitional rules, and narrow scope to avoid disruption to federal programs.
Generally supportive.
The bill affirms biological definitions of sex and rejects gender identity as a legal substitute, aligning with priorities to preserve sex-based distinctions for policy, privacy, and women-only spaces.
Supporters will see it as restoring objective categories in federal law.
The path through Congress.
Reached or meaningfully advanced
Reached or meaningfully advanced
Still ahead
Still ahead
Still ahead
Broad, ideologically charged federal redefinition with high litigation risk and little compromise language makes enactment unlikely.
- How courts would treat retroactive reinterpretations of existing statutes
- Absence of Congressional Budget Office or cost estimate
Recent votes on the bill.
No vote history yet
The bill has not accumulated any surfaced votes yet.
Go deeper than the headline read.
Progressive: emphasizes harm to transgender and intersex people
Broad, ideologically charged federal redefinition with high litigation risk and little compromise language makes enactment unlikely.
Relative to its intended legislative type, this bill is a clear, direct statutory effort to establish uniform federal definitions of 'sex' and related terms by amending chapter 1 of title 1, U.S. Code. It specifies text…
Go beyond the headline summary with full stakeholder mapping, legislative design analysis, passage barriers, and lens-by-lens tradeoff breakdowns.