littledinaco just the right approach, but I would maybe have fudged the can't be a boy bit. But each to his /her own. 
At the bottom of all this pontificating is a family who have been to hell & back, and a mother who did the best she could at the tme with the knowledge she gained from the health care professionals she consulted and the research available at the time.
birdbandit sympathies for your awful experience but no I am not your ex, nor has my child been brainwashed by internet cults, although he did find it useful to get different experiences & views at first.
I resent the implication by some on this thread that I did anything less than my best for my son and would remind all of you who are trying to shout me down that you. were. not .there.
Would I do the same things again, maybe not, would I have started him on blockers if he were younger at the time, absolutely if that's what was right for HIM and we had all the latest research. The anguish of watching him suffer every month and beyond was indescribable.
This was not a fantasising, hysterical child but a child who ticked all the boxes, Persistant,Consistant & Insistant in his belief that he was trans.
Whether or not I agreed was not an issue as by the time we got professional help he was 16 and I could either support him unconditionally in finding the best NHS care we could get, or lose him from my life as he was heading down that path regardless. If I had rejected him I may well have lost him totally.
His misery was beyond merely dressing as a boy or taking a boys name, he was and is a boy. I know some of you can't grasp this and basically neither can I really but it's what he needed to do to be happy & numerous pysche evaluations concurred that he was mature enough to make that choice.
And he has never once wobbled in his path even though it was made clear to him on numerous occasions that he could pause stop or turn back at any point (although obv risks in later stages) Each step of the way saw him become happier, and more content, as each last vestige of his femininity disappeared.