New brain imaging research reveals that transgender adolescents show brain activity patterns more similar to their experienced gender than their assigned sex at birth. Using MRI scans and tests involving pheromones and memory exercises, scientists found that these teens’ brains responded in ways that aligned with the gender they identify with. The findings suggest that the roots of gender identity may appear early in brain development, offering hope for earlier and more supportive diagnosis and care for young people with gender dysphoria.