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According to the Intersex Society of North American (ISNA), intersexuality refers to a set of medical conditions that feature "congenital anomaly of the reproductive and sexual system." That is, intersex people are born with "sex chromosomes," external genitalia, or internal reproductive system that are not considered "standard" for either male or female.

• Intersex Society of North America:ISNA is devoted to systemic change to end shame, secrecy and unwanted genital surgeries for people born with atypical reproductive anatomies
• Parents Celebrating our Unique Children
• Androgen Insensitivity Syndrome Support Group
• HELP is a support group for parents, family, friends and persons affected by Sex Differentiation Disorders. It is a source of medical information, literature and personal experiences. The goal is to connect persons affected by these disorders, to educate the public and medical profession, and to offer emotional support and understanding to those facing the decisions involved with these disorders.