Gender identity, gender expression, and sex are considered independent of one another. For example, a person may have the sex of male, which was given at birth, the gender identity of female, and the gender expression of masculine with variations like "butch", "femme", transgender, genderqueer, or nonconforming queer. A transgender person “may or may not have a gender expression that is different from the social expectations of the sex assigned at birth.”
A detached feature of the same person is sexual orientation. Staying with the example given, one can have the assigned sex at birth of male; a gender identity of female; a masculine gender expression; and an orientation of gay, lesbian, or heterosexual. In addition, one may change or transition one’s gender, gender identity, gender expression, and sexual orientation throughout life.
