Researchers have found that both early socialization and hormonal factors may play a role in the development of gender identity disorder.
Children with gender identity disorder usually feel from their earliest years that they are trapped in the wrong body and begin to show signs of gender confusion between the ages of two and four.
Girls with gender identity disorder are bored by ordinary female pastimes and prefer the rougher types of play typically associated with boys, such as contact sports.
Inchildhood, girls with gender identity disorder experience less overall social rejection than boys, as it is more socially acceptable for a girl to be a tomboy than for a boy to be perceived as a "sissy."
Teenagers with gender identity disorder suffer social isolation and are vulnerable to depression and suicide.