re: 12-year-old boy who transitioned to female changes his mind just two years later

So what we've been taught in medical school is to wait until they go through puberty before really having a discussion on hormone therapy.

Because the vast majority of children that have this idea early in life (the number quoted was near 90%) revert back so their assigned sex and gender align.

If however after puberty they still have strong gender dysphoria and it is overwhelming in nature, then they need referral to a specialist in childhood psych, along with a referral to a specialist in hormone therapy.

To start it at 10 is radical in my eyes.

But who knows how the medical community is going to swing on this. They could set the bar down lower and lower, it all depends on how insistent the child/parents and the doctor who is treating the child are.