The full article is available for those interested. It is good to have a synthesis of all the science to date on the biology of gender identity.
Evidence Supporting the Biological Nature of Gender Identityhttp://aace.metapress.com/content/2k70161258g45656/Aruna Saraswat and others
Endocrine Practice; 2015
AbstractObjective: To review current literature that supports gender identity having a biologic basis.
Methods: A traditional literature review.
Results: Evidence that there is a biological basis for gender identity primarily involves 1. data on gender identity in patients with disorders of sex development (also known as differences of sex development) along with 2. neuroanatomical differences associated with gender identity.
Conclusions: Although the mechanisms remain to determined, there is strong support from the literature that there is a biological basis for gender identity.