A recent memo by the Health and Human Services Department to other federal agencies in the Trump administration called for adopting a narrow definition of gender that would effectively roll back many legal protections granted to transgender people during the Obama administration.

HHS called on government agencies to adopt a definition of gender that used “a biological basis that is clear, grounded in science, objective and administrable.” The department said that gender should be defined as simply male or female from birth and be considered immutable, according to a New York Times report.