Medical practitioners have to be careful with children with gender identity issues, said Dr. Kenneth Zucker, head of the Gender Identity Service in the Child, Youth, and Family Program and professor at the University of Toronto. Giving children hormone blockers to kids before the age of 13 is too early, he said.
Zucker conducted a study following 109 boys who had gender identity disorder between the ages of 3 and 12. Researchers followed up at the mean age of 20 and found 12% of these boys continued to want to change genders.
“The vast majority of children lose their desire to be of the other gender later,” he said. “So what that means is that one should be very cautious in assuming say that a 6-year-old who has strong desire to be of the other gender will feel that way 10 years later.”
http://lifestyle.myjoyonline.com/pages/parenting/201109/73678.php
Read this story if you have time. Posted upthread by txroadkill. Nature vs nurture scenario
http://www.cbc.ca/news/background/reimer/