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New findings from the largest study of socially-transitioned transgender children in the world, conducted by researchers at the University of Washington, show that gender identity and gender-typed preferences manifest similarly in both cis- and transgender children, even those who recently transitioned.

Marlo Mack’s son was 3 years old when he told her very adamantly that he was not a boy, but a girl. Unsure what to do, Mack went in search of answers. She found little information online, her pediatrician knew nothing about transgender children, and even a psychologist who specialized in child identity issues couldn’t answer her questions. Mack quickly learned there was almost no research that could help her determine whether to allow her son to live as a…