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Defining Male and Female Act of 2025
To establish clear and consistent biological definitions of male and female.
Summary
This bill amends federal law to establish definitions for sex-related terms used in Congress and federal agencies. The bill defines male and female based on reproductive system function at conception, and defines sex as immutable biological classification. The bill also provides that the term gender identity, defined as an internal subjective sense of self disconnected from biological reality, shall not be recognized by the federal government as a replacement for sex when interpreting federal law.
AI-generated plain-language summary of the bill text — neutral, and may be imperfect. See the full text below for the exact wording.
Sponsor (1)
- Sen. Marshall, Roger [R-KS] (R-KS)
5 cosponsors
- Sen. Cassidy, Bill [R-LA] (R-LA)
- Sen. Hyde-Smith, Cindy [R-MS] (R-MS)
- Sen. Ricketts, Pete [R-NE] (R-NE)
- Sen. Risch, James E. [R-ID] (R-ID)
- Sen. Sheehy, Tim [R-MT] (R-MT)
Money behind the sponsor
Top reported contributors to Roger Marshall’s campaign committee (2024 cycle) — who funds the bill’s sponsor, not a claim about this bill. Data from FEC.
- NULL $46,314
- PYRAMID SOUND $19,800
- GROWITZ EQUITY $13,200
- SPECCHEM $13,200
- ONYX EQUITY PARTNERS $13,200
Organizations whose employees gave the most — itemized individual contributions grouped by the donor’s reported employer (FEC Schedule A). Full finance for Roger Marshall → · Outside spending →
Actions (2)
- Mar 26, 2025 Read twice and referred to the Committee on the Judiciary. · senate
- Mar 26, 2025 Introduced in Senate
Similar bills (6)
Bills with similar text or summary — includes reintroductions across Congresses. Ranked by semantic similarity of the bill text (computed locally); a neutral discovery aid, not a claim the bills are duplicates.
Full text
IN THE SENATE OF THE UNITED STATES
March 26, 2025
Mr. Marshall (for himself, Mr. Cassidy, Mr. Sheehy, Mrs. Hyde-Smith, and Mr. Ricketts) introduced the following bill; which was read twice and referred to the Committee on the Judiciary
A BILL
To establish clear and consistent biological definitions of male and female.
Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled,
SECTION 1. SHORT TITLE.
This Act may be cited as the “Defining Male and Female Act of 2025”.
SEC. 2. DEFINITION OF “SEX”, “MALE”, “FEMALE”, AND RELATED TERMS.
Chapter 1 of title 1, United States Code, is amended by adding at the end the following:
“SEC. 9. DEFINITION OF ‘SEX’, ‘MALE’, ‘FEMALE’, AND RELATED TERMS.
“In determining the meaning of any Act of Congress, or of any ruling, regulation, or interpretation of the various departments and Federal agencies of the United States, the term—
“(1) ‘boy’ means a minor human male;
“(2) ‘father’ means a male parent;
“(3) ‘female’, when used to refer to a natural person, means a person belonging, at conception, to the sex characterized by a reproductive system with the biological function of producing eggs (ova);
“(4) ‘gender identity’ means an identity that reflects an internal and subjective sense of self, disconnected from biological reality and sex and existing on an indeterminate continuum, and, because such an identity does not provide a meaningful basis for identification for purposes of Federal law, the term shall not be recognized by the Federal Government as a replacement for sex;
“(5) ‘girl’ means a minor human female;
“(6) ‘male’, when used to refer to a natural person, means a person belonging, at conception, to the biological sex characterized by a reproductive system with the biological function of producing sperm;
“(7) ‘man’, except when used as a generic reference to human beings, means an adult human male;
“(8) ‘mother’ means a female parent;
“(9) ‘sex’, when referring to a natural person’s individual’s sex, means the person’s immutable biological classification as either male or female, as biologically determined and defined by this section; and
“(10) ‘woman’ means an adult human female.”. <all>
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