TRANS MICE Act

United States119th CongressHR-4512House of Representatives
Updated: Jul 17, 2025

Summary

This bill, known as the "TRANS MICE Act," aims to prohibit the use of federal funds for specific types of animal research. It broadly bans federal funding for any research that seeks to alter the biological sex of certain non-human vertebrate animals. Specifically, the legislation defines "covered research" as studies involving drugs, hormones, surgery, or other interventions designed to change an animal's body to no longer correspond to its natural biological sex. This includes research that disrupts development, inhibits natural functions, or modifies the physical appearance of the animal. The prohibition applies to "qualified animals," which encompass most non-human vertebrate species such as mammals, birds, fish, reptiles, and amphibians. However, it explicitly excludes animals that naturally change sex during their lifetime or possess both male and female reproductive organs.

Bill texts

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Introduced (House)View official text

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Timeline

  1. Referred to the House Committee on Science, Space, and Technology.

    House of Representatives

  2. Introduced in House

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