"Intersex" is the medical term for people with sex characteristics that do not fit the typical definitions of male or female, and it has nothing to do with whether a person identifies as transgender. Upstate pediatric endocrinologist Susan Stred, MD, is an expert in this condition, which occurs about as often as a person is born with red hair. She explains some of the complexities of this condition and what parents need to know if their baby is born intersex. Click here for more on intersex issues and differences of sexual development; here for more on sexual development, with diagrams and information; here for a handbook for parents and guidelines for health care providers; here and here for more on support groups; and here for a USA Today article about a Belgian intersex model where Stred discusses the issues involved.