Studies of transition regret or detransition in different populations have found different (average or median) elapsed times before these occurred: a 2018 study found 10 years and 10 months on average to regret (but not necessarily detransition) from start of hormonal therapy, and a 2014 study of those who had surgery found a median lag of 8 years before requesting a reversal of legal gender status. A 2021 UK study found evidence that supports detransitioning occurring on average 4–8 years after transitioning.
