^^and how are those people transgender? They are interSEX.
ELSI of Genetic Components of Sex and Gender The issues of gender assignment, gender verification testing, and legal definitions of gender are especially pertinent to a discussion on the ELSI of gender and genetics. These practices, however, are misnomers as they actually refer to biological sex and not gender. Such a discrepancy is highlighted by the existence of intersex individuals whose psychosexual development and gender sometimes do not match the biological sex assigned to them as infants. In this report the term sex will be used where the practice refers to biological sex and not the more social construct of gender.
Gender Assignment of Intersex Infants and Children Legal Definitions of Gender