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https://en.wikipedia.org/wiki/Sexual_minority
 
A sexual minority is a group whose sexual identity, orientation or practices differ from the majority of the surrounding society. Primarily used to refer to LGBT or non-heterosexual individuals, it can also refer to transgender, genderqueer (including third gender) or intersex individuals.

Variants such as GSM ("Gender and Sexual Minorities"), GSSM ("Gender, Sexual and Sexuality Minorities") GSRM ("Gender, Sexual and Romantic Minorities"), and GSD ("Gender and Sexual Diversity") have been considered in academia, but it is SGM ("Sexual and Gender Minority") that has gained the most advancement since 2014. In 2015 the NIH announced the formation of the Sexual and Gender Minority Research Office and numerous professional and academic institutions have adopted this term.

Sexual and gender minority is an umbrella term that encompasses populations included in the acronym "LGBTI" (lesbian, gay, bisexual, transgender and intersex), and those whose sexual orientation or gender identity varies. It includes those who may not self-identify as LGBTI (e.g., queer, questioning, two-spirit, asexual, men who have sex with men, gender variant), or those who have a specific medical condition affecting reproductive development (e.g., individuals with differences or disorders of sex development, who sometimes identify as intersex).

Origins