Trans man

A trans man is a man whose gender identity differs from the sex he was assigned at birth. Trans men may describe their identities and experiences in varied ways.

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Gender identity: A person's deeply felt sense of their own gender, which may or may not match sex assigned at birth. Being a trans man concerns the relationship between this identity and birth assignment.
Gender transition: A process through which a person may align aspects of life with their gender identity. Some trans men transition socially, legally, medically, or in several of these ways.
Social transition: Changes in social presentation or daily life that express a person's gender, such as name, clothing, or pronouns. A trans man may choose these changes without pursuing medical treatment.
Lou Sullivan: An American transgender activist and writer who documented gay trans men's lives. His diaries and advocacy challenged assumptions about who could be a trans man.
Sex assignment: The classification of a newborn as female, male, or another category, usually based on observed anatomy. The term trans man specifically distinguishes gender identity from this birth classification.
Chosen name: A name a person uses instead of, or alongside, a name given earlier in life. Using a trans man's chosen name can recognize his identity and personal history.
Testosterone therapy: Treatment using testosterone to produce or maintain changes associated with masculinization. Some trans men use testosterone as part of gender-affirming care; it is not universal.
Leslie Feinberg: An American writer and transgender activist known for the novel Stone Butch Blues. Feinberg's work explored gender variance and influenced transgender activism.
Transgender: An umbrella term for people whose gender identity differs from the sex they were assigned at birth. Trans men are one group within this broader category.
Pronouns: Words used to refer to people, such as he, she, and they. Many trans men use he and him, though individual pronoun choices vary.