Sentence:  One wife I met at a conference was in a hurry for her husband to have the genital surgery because she worried about his <WSD>gender</WSD> and genitals not matching if he were in a car accident, ... 
Meaning of the word marked with <WSD> tags:  Identification as a man, a woman(,) or something else, and association with a (social) role or set of behavioral and cultural traits, clothing, etc; a category to which a person belongs on this basis. (Compare "gender role", "gender identity".) (from 20th c.)