Coy Mathis, right, plays on the computer at their home in Fountain, Colo., Monday Feb. 25, 2013. Coy has been diagnosed with Gender Identity Disorder. Biologically, Coy, 6, is a boy, but to his 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)
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