1. any of a large group of diseases characterized by abnormal functioning of the immune system that causes your immune system to produce antibodies against your own tissues. Familiarity information: AUTOIMMUNE DISEASE used as a noun is very rare. Dictionary entry details. â¢ AUTOIMMUNE DISEASE (noun).
There is no clearly understood or universally agreed-upon cause for gender identity disorder. However, most experts agree that there may be a strong biological basis for the disorder. The sex of a human baby is determined by chromosomes.
Causes of transsexuality. The study of the causes of transsexuality investigates gender identity formation of transgender people, especially those who are transsexual. Transsexual people have a gender identity that does not match their assigned sex, often resulting in gender dysphoria. The causes of transsexuality have been studied for decades.