Intersex
Gender transition, expression and identity tool kit, published by CBRE, suggests: ‘People with intersex status are born with physical, hormonal or genetic features that are neither wholly female nor wholly male, or a combination of female and male. Intersex is always congenital and can originate from genetic, chromosomal or hormonal variations.’
Stonewall suggests intersex is: ‘A term used to describe a person who may have the biological attributes of both sexes or whose biological attributes do not fit with societal assumptions about what constitutes male or female. Intersex people may identify as male, female or non-binary.’ Ref https://www.stonewall.org.uk/help-advice/faqs-and-glossary/glossary-terms