FILE - Coy Mathis, left, plays with her sister Auri, at their home in Fountain, Colo., on Monday, Feb. 25, 2013. Coy has been diagnosed with Gender Identity Disorder. Biologically, Coy, 6, is a boy, but to her family members and the world, Coy is a transgender girl. (AP Photo/Brennan Linsley, File)