S.1147

The Defining Male and Female Act of 2025 establishes biological definitions for male, female, and related terms.

The Defining Male and Female Act of 2025 amends the United States Code to establish clear and consistent biological definitions for terms such as "male," "female," "man," "woman," "mother," and "father." It specifies that "male" refers to a person with a reproductive system that produces sperm, and "female" refers to a person with a reproductive system that produces eggs. The act also defines "sex" as an immutable biological classification based on these definitions. It explicitly states that "gender identity" is not recognized by the federal government as a replacement for sex.