Introduction to healthcare for transgender and gender-diverse people.

This editorial provides a broad introduction to transgender health for transgender and gender-diverse people. Following a brief description of the history of transgender and gender-diverse people, the development of medical treatment is discussed, together with the use of appropriate terminology and language. The content largely draws attention to the guidance in the Standards of Care for the Health of Transgender and Gender Diverse People Version 8 developed by the World Professional Association for Transgender Health (WPATH) and published in 2022. Further key areas addressed are as follows. • The use of names and pronouns. • Population estimates of transgender and gender diverse people. • Diagnostic classification systems in transgender health. • A wide range of gender-affirming medical interventions, including hormones and surgeries. • Ethical considerations for research with transgender and gender diverse populations.