In this Monday, Feb. 25, 2013, photo, Coy Mathis, left, plays with her sister, Auri, 2, center, near a mirror at their home in Fountain, Colo. Coy has been diagnosed with Gender Identit

 

              In this Monday, Feb. 25, 2013, photo, Coy Mathis, left, plays with her sister, Auri, 2, center, near a mirror at their home in Fountain, Colo. Coy has been diagnosed with Gender Identit
In this Monday, Feb. 25, 2013, photo, Coy Mathis, left, plays with her sister, Auri, 2, center, near a mirror at their home in Fountain, Colo. Coy has been diagnosed with Gender Identity Disorder. Biologically, Coy, 6, is a boy, but to her parents, three sisters and brother, family members and the world, Coy is a transgender girl. Ideas about gender-disorders began to develop in the 1950s, and have been evolving ever since, both within the medical community, and in American society. (AP Photo/Brennan Linsley)