This question reflects a common misunderstanding about gender identity and medical treatment. Research shows that gender identity is established very early in development, not created or changed through medical intervention. Medical treatment does not transform a boy into a woman, but rather helps align physical characteristics with an already established gender identity.
Evidence indicates that gender identity develops in the brain during foetal development, separate from physical sex characteristics. When someone seeks gender-affirming medical care, they are not changing who they are fundamentally. Instead, medical treatment can modify physical characteristics such as hormone levels, body composition, and secondary sex characteristics to better match their internal sense of self. However, certain biological features like chromosomes cannot be altered through medical intervention.
Guidelines from major medical organisations recognise that gender-affirming care aims to reduce distress and improve wellbeing by helping align the body with an established gender identity. The treatment supports someone's authentic self rather than creating a new identity. Understanding this distinction helps clarify that medical intervention is about alignment and authenticity, not transformation from one gender to another.