Independent Review of Gender Identity Services for Children and Young People: Final Report (Cass Review) (2024)

Government Record · Dr Hilary Cass (chair), commissioned by NHS England · April 10, 2024

388-page final report of the English independent review. Concludes the evidence base for puberty blockers and cross-sex hormones for minors is weak; recommends blockers only within a research protocol, hormones from 16 with extreme caution under 18, psychosocial support first-line, and a fundamentally different regional service model.

There was insufficient/inconsistent evidence about the effects of puberty suppression on psychological or psychosocial wellbeing, cognitive development, cardio-metabolic risk or fertility.

p. 32 (paras 81-82), per verbatim transcription in secondary analyses; PDF text layer not extractable through our fetcher

388-page final report of the English independent review. Concludes the evidence base for puberty blockers and cross-sex hormones for minors is weak; recommends blockers only within a research protocol, hormones from 16 with extreme caution under 18, psychosocial support first-line, and a fundamentally different regional service model. full text verified against multiple verbatim reproductions (e.g., CMDA analysis, McDeavitt et al. 2025). Report commissioned by NHS England – a health system reviewing its own service; independent chair. Challenges: Yale Integrity Project (MMA-06), PMC12065279 critical appraisal (MMA-44).