Gender identity refers to a person’s innate, deeply felt internal and individual experience of gender, which may or may not correspond to the person’s physiology or designated sex at birth. It includes both the personal sense of the body, which may involve, if freely chosen, modification of bodily appearance or function by medical, surgical, or other means, and other expressions of gender, including dress, speech, and mannerisms.
Sources: UNFPA and Promundo (2010). Engaging Men and Boys in Gender Equality and Health. A Global toolkit for action; UNAIDS (2011). UNAIDS Terminology Guidelines.