Using hormones in an attempt to change reality is extremely dangerous.
The DSM-V says 88% of girls and 98% of boys who are "gender-confused" grow out of these thoughts after puberty. If an adult says he wants to go through the process, he will have to answer for his own actions. But putting a child's physical and mental health at stake is child abuse.
When we have children, we are given a great responsibility. Let's take that seriously.