TRANS MICE Act

HR 4512, the TRANS MICE Act, prohibits federal funding for research on non-human vertebrate animals (excluding certain species that naturally change sex or have both reproductive organs) that aims to alter their physical characteristics to no longer match their biological sex. This includes research disrupting development, inhibiting natural body functions, or modifying appearance. The bill directly affects federally funded researchers and institutions conducting such animal studies, banning all federal financial support for this specific type of research. It does not ban the research itself but restricts the use of taxpayer funds for it, applying to mammals, birds, fish, reptiles, and amphibians (excluding "excepted animals" like some hermaphroditic species). The law focuses on funding mechanisms, not on human transgender care.