History and prevalence of gender dysphoria
The purpose of this chapter is to briefly describe the long history of gender diversity; address difficulties in estimating the number of gender diverse people worldwide and the challenges for researchers and medical and mental health professionals, who wish to define and count this population; to look at the history and utility of Gender Dysphoria as a diagnosis in the DSM-5 and the International Classification of Diseases (ICD); and to provide some historical perspective on the evolution of standards of care over time. It seeks to describe how we got here, how the history of diagnoses has influenced where we are, and how we move forward in the care and management of gender dysphoria. The chapter is divided into four sections: A Short History of Gender Diversity, Being Counted, A Brief Review of Diagnostic Changes over Time, and An Evolution of Guidelines. Each section ends with thoughts on future directions and the need for further work.
