Cori Cohn
Detransitioner and public advocate
Cori Cohn was nineteen when he underwent genital surgery in 1994 — before the systematic reviews now reshaping European gender medicine existed. Thirty years on, his testimony reaches a continent whose clinical bodies in Sweden, Finland, France and the Netherlands are each confronting the same question: what did the protocols of that era miss, and what cannot be undone?
Cori Cohn was nineteen years old when, in 1994, he underwent genital surgery as part of a medical transition. Three decades later, in the Beyond Gender episode 30 Years After Transition, Cori Cohn Speaks Out (episode 32, August 2025), he spoke with hosts Stella O'Malley, Mia Hughes and Dr Bret Alderman about what that intervention failed to resolve — and what it permanently foreclosed. His account is not a story of regret alone; it is a detailed, longitudinal record of the gap between what gender medicine promised in the 1990s and what it could actually deliver.
The timing carries particular weight for European audiences. The Dutch protocol — developed at the Amsterdam gender clinic and exported globally as the defining standard of paediatric care — is now under systematic review in the Netherlands. Sweden's national health authorities restricted hormonal and surgical interventions for minors in 2022; Finland's COHERE issued comparable guidance that same year; France's Académie Nationale de Médecine urged caution in 2022; and the UK's Cass Review reached the same conclusions in 2024. Cohn's experience, though American, addresses precisely the clinical assumptions that shaped those same European protocols during the decade in which he was treated.
What sets his testimony apart is its span. Where most detransitioner accounts cover a few years, Cohn's covers three decades — long enough to speak to what did and did not change over time, and to the irreversibility that European clinicians and policymakers are now placing at the centre of their risk frameworks. His voice is part of a growing body of adult testimony that is materially influencing the future of gender medicine across the continent.
