In Swedish: https://svenska.yle.fi/a/7-1431961 https://svenska.yle.fi/a/7-1431961 and https://www.svt.se/nyheter/granskning/ug/explosionsartad-okning-av-tonarin

In Swedish: https://svenska.yle.fi/a/7-1431961 https://svenska.yle.fi/a/7-1431961 and https://www.svt.se/nyheter/granskning/ug/explosionsartad-okning-av-tonaringar-som-genomgar-konskorrigering https://www.svt.se/nyheter/granskning/ug/explosionsartad-okn... and https://www.svt.se/nyheter/granskning/ug/har-behandlas-flera-som-angrar-sin-konskorrigering-fem-till-tio-personer https://www.svt.se/nyheter/granskning/ug/har-behandlas-flera... In summary, there's been a recent explosing in the number of people performing transition in the last 10 years or so (from around 20 people per year in 2003 to 2007, to over 400 people in 2018)... so the number of cases where we have information about this is very few, and those who used to do it in the past, despite the stigma, were likely much more "certain" that this is what they want. But of that older generation, only 2.2% are known to have actually gone though a de-transition (the figure does not include those who did seek help but did not go through with the process)... however, it's possible that many more regret it but never tried to revert it, as de-transitioning is even more difficult, and perhaps even more "embarrassing" (sorry for the term, I don't know if it's the best word here as I don't think anyone should be embarrassed for that, but I suspect they do) for the person to "come out" than for transitioning. One doctor interviewed claims "a handful" of patients (5 to 10) they treated have regreted and are currently detransitioning. So I think my argument that "lots of teenagers" are regreting is accurate, given there's a lot of other doctors doing this in Sweden, but up to you to make up your mind if a handful of people doesn't matter. What shocked most people was the fact that teens as young as 14 were allowed to go through with the transition despite them having other serious mental health issues (half of the girls had autism or self-harm issues or anorexia) and without a serious, properly investigated diagnosis. Some who regret have to keep their identity secret because apparently they get told that they are hurting the trans community by talking about it, so it's not unresonable to believe at least some people decide to keep quiet about their regrets. Finally, researchers in this area seem to agree that there's almost no data regarding the long term impact of transitioning and hence the process should be much more scrutinized than it currently is (some of the trans in the linked articles say they were basically treated as "lab rabbits")... Hope that informs you enough to understand the debate that has been going on in Sweden, which unlike in the US, almost completely lacks the transphobic arguments and focuses on the actual data (or lack thereof) regarding trans people's wellbeing and whether there's enough evidence that people who are allowed to transition could not have been just suffering from other mental issues at the time their extremely serious decision was made.