I get requests all the time for evidence that most trans-identified kids grow out of it, the vast majority of them going on to be gay or lesbian adults. Here you go. Plenty of studies, helpfully compiled by Dr. James Cantor at this link:

http://www.sexologytoday.org/2016/01/do-trans-kids-stay-trans-when-they-grow_99.html?spref=tw

Of course, nowadays, we’re influencing kids to STAY trans by “socially transitioning” them, using “preferred pronouns,” and puberty blockers. Wouldn’t it be interesting to just leave them alone instead of reassuring them that they really ARE the opposite sex, given how high the medical stakes are?