The feeling of being a girl trapped in the body of a boy is difficult to describe in words. Imagine being a female confronted with the prospect of entering male puberty, scared of developing a deep voice and a visible Adam’s apple, and distressed at the thought of growing a beard? In this series we meet 14 people aged between eight and 70 years, all of whom are at different stages in the process that is today known as “confirming your gender”.