Is gender identity biologically hard-wired?

Aired: 5/13/2015 | 0:09:41 | Clip
At an early age, 8-year-old Skyler Kelly began to let his parents know that what he looked like on the outside, a girl, is not how he felt on the inside. The science of gender identity isn't fully understood, but new research points to a complex set of factors, including biological ones. Special correspondent Jackie Judd talks to families and researchers who are working on these discoveries.

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