“I was failed by the system. I literally lost organs.” When Chloe was 12 years old, she decided she was transgender. At 13, she came out to her parents. That same year, she was put on puberty blockers and prescribed testosterone. At 15, she underwent a double mastectomy. Less than a year later, she realized she’d made a mistake — all by the time she was 16 years old. Now 17, Chloe is one of a growing cohort called “detransitioners” — those who seek to reverse a gender transition, often after realizing they actually do identify with their biological sex....