Atypical means irregular or abnormal, therefore atypical gender development means that a person has not developed gender in the ‘normal’ way. This could be due to abnormal chromosomes and/or abnormal hormone exposure in the womb, which results in a mismatch between gender identity and biological sex. Such conditions are referred to as intersex. The term is also used to refer to people with gender identity disorder (GID), which is a psychiatric condition where a person feels uncomfortable with the gender assigned to them at birth. GID is now known as gender dysphoria.