This is mainly a test link, but explores the effects of gender-transition medication upon the wellbeing of transgender youth
I know for me, within the space, the biggest consideration I would have is "Is this the best option for the client, and am I offering them unconditional positive regard; have I stepped into their world and understanding of it, or am I viewing it with an agenda." As a counsellor, that would be a present consideration through both sides, regardless of whether the client experienced gender dysphoria or was gender critical.
As a counsellor, it's not about our thoughts and feelings about how someone should be living their life, but to help them navigate, explore and process their emotions, thoughts and experiences in a way that makes sense to them. Of course, challenge is a useful tool in the counselling room, but with charities such as Mermaids, I would find myself concerned about collusion. That is down to my own ethical concerns about Mermaids, however.
ESPECIALLY from a counselling POV, I don't feel this is as cut and dry as providing the theory regarding the effects, but at the same time, we need to be sure that both ourselves and our clients are reasonably informed with whatever decisions are made. I'd certainly consider how my responses measured to the BACP (or other governing bodies') ethical frameworks.