Is gender identity biologically hard-wired?
Clip: 05/13/2015 | 9m 41s
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.
Problems Playing Video? | Closed Captioning