Time until treatment regret emerges may be eight years or more.

An analysis¹ showed that the median time to surgical regret may be as high as eight years. For cross-sex hormone treatment, the time to regret may be almost eleven years (130 months). However, the analysis points out that the lack of thorough follow up in much of the research in this field, and the lack of detailed research into the detransitioner/desister population, mean that accurate figures are very hard to discern. 

1. Cohn, J. The Detransition Rate Is Unknown. Archives of Sexual Behaviour 52, 1937–1952 (2023). https://doi.org/10.1007/s10508-023-02623-5 ↩︎