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Assigned Sex
a person's legal-sex assigned at birth based on the appearance of their external genitals at birth. For most people this is a useful way to assign a newborn's sex.
 
Brain Sex
(also called innate-sex or true-sex)
Brain sex develops as a biological process just like other sexually differentiated features of the human body; such as gonads and external genitalia.
In the absence of mental ill health, an individual’s brain-sex is the sex which the individual perceives themselves to be.
 
FTM
(sometimes written as FtM, F2M etc)
Abbreviation of the term Female-To-Male transsexual. FTM distinguishes the experience of males raised as females from that of females raised as males (MTF).

The term 'FTM' appears to be gaining popularity in lesbian communities to refer to masculine-appearing lesbians who appear to be male ('pass') but who identify themselves to be female.

 

Gender

The subjective feeling that you're a girl or a boy, man or woman. It is often assumed gender has the same meaning as sex.
Gender refers to the social expression of sex.
 

Gender Binary

The classification of people into two categories: 'male' or 'female' - hence the gender-binary (binary meaning two).
 

Gender Dysphoria

Dysphoria is a medical term and means 'intense discomfort'. 'Gender dysphoria' can be applied to everyone from cross-dressers, transgender people and men and women with the medical condition of transsexualism.

Some people who experience 'gender dysphoria' have the physical condition that is called transsexualism. Not all people with 'gender dysphoria' have the physical condition transsexualism.

 

Gender Identity

A person's innate deeply felt psychological identification as male or female. For most people this matches their physical body.
 
 
Identity
Usually a label from your culture, society, peer group or language and usually commonly understood by other people.
 
 
Intersex
A grouping of diagnostic conditions where human development results in having both male and female characteristics. "Intersex" would contain all those different variations where individuals had both male and female sex characteristics (eg., pAIS, AIS, CAH, Klinefelter's or any of the many other variations in sexual formation).

Some intersex variations are apparent at birth, others are discovered later in life, perhaps at puberty or when infertility is experienced. Transsexualism was first described by Dr Magnus Hirschfeld in 1923 as an intersex variation. Many experts in scientific research, medicine and law consider transsexualism to be within the nosology of intersex, because of the incongruity between the sex of the brain and the sex of the rest of the body.

 
Legal Sex
Refers to the legally documented category of 'male' or 'female' assigned to a baby at birth. This is usually based on the appearance of the newborn's genitals. A person's legal-sex is evidenced by their "Birth Certificate", a legal identity document and recorded in the legal record of Births, Deaths and Marriages. Generally, this is a useful way to assign a newborn's sex.

For men and women who experience transsexualism, this assignment of legal-sex means they are 100% assigned the opposite legal-sex at birth.

 

MTF

(sometimes written as MtF, M2F etc)
Abbreviation of the term Male-To-Female transsexual. MTF distinguishes the experience of females raised as males from that of males raised as females (FTM).
 

Phenotype

The body - in particular the sexually differentiated features of the human body: gonads and genitals. (Compare - genotype:chromosomes).
 
Rehabilitation/ Rehabilitative
To conclusively restore the sexually differentiated features of the body, through hormonal and surgical treatments, so as to bring it into better harmony with the individual’s brain sex.
 
Sex
Based on a combination of biological characteristics, such as chromosomes, genitalia, reproductive organs and the structure and chemistry of the brain (see phenotype).

Secondary sexual characteristics include the distribution of body and facial hair, voice pitch and fat distribution. It is usually assumed that there are two sexes, male and female. Natural human development includes people who are born with a combination of both male and female characteristics (see intersex).

 
Sex Affirmation
(previously known as Sex reassignment)
Rehabilitative hormone therapy and surgical procedures undertaken to transform the rest of the body to match the sex of the brain, to the fullest extent possible (replaces the misleading term "sex change").
 
Such treatment is rehabilitative in purpose and, therefore, does not require results that are either cosmetically or functionally ‘perfect’ or complete in order to be considered successful. When an individual with transsexualism publicly reveals or affirms their innate sex, they can be said to have transitioned public sexes or to have undertaken the act of sex affirmation.
 
Standards of Care (Harry Benjamin Standards of Care)
A set of guidelines, which assist medical practitioners to provide care and treatment to people, The Standards of Care for Gender Identity Disorders were developed and regularly updated and revised by the Harry Benjamin International Gender Dysphoria Association. Also called Harry Benjamin Standards.
 
Transgender - (tg)
Originally defined by Charles 'Virginia' Prince in the 1970s, referring to someone who lives in the sex opposite to their sex identified at birth. Unlike transsexual people, most transgender people do not have the desire to under surgery to correct anything about their body. They 'trans' their gender rather than their sex. Hence the term transgender. Unlike men and women with ts, who have a unchanging gender throughout their life.

Today, it also includes those individuals who have a core sense of gender which is neither or both genders and often crosses the traditional gender binary construct entirely.

The term transgender has crept into usage as an umbrella term to encompass many diverse conditions and identities; including transsexualism and other recognised intersex conditions, as well as behaviours, which explore gender such as cross dressing and "drag" performance. Many at the forefront of social, medical and legal education and reform consider this umbrella usage counterproductive.

The terms transsexual and transgender are not interchangeable. They mean different things, which is particularly significant in medical and legal contexts.

 
Transsexualism - (ts)
One of the many possible biological variations in human sexual formation.

A condition that exists in someone who at birth has chromosomes, reproductive organs, and genitals which appear to be typically of one sex, but whose brain has sexually differentiated to the other sex.

Men and women with transsexualism are simply male or simply female - even though their body doesn't correspond to that sex development. These men and women seek physical rehabilitative treatment to live according to the sex they are, rather than the sex they were assumed to be at birth.

They desire a physical appearance, which reflects their true sex, and to these ends most want to rehabilitate their bodies through hormonal and surgical treatments. Transsexualism is a treatable physical condition, not a psychological one.

 
Transition
The process whereby an individual affirms their innate sex by social, medical and legal steps to bring their body and public presentation into harmony with their innate sex or brain sex, has undertaken the act of sex affirmation.

Transition also includes adjustment by family members, friends and workmates.  


ATSN speaks of the terminology of transsexualism as it is experienced by men and women with transsexualism, rather than as observed by people who do not experience this condition. The ATSN supports terms and meanings as a fresh language of liberation for people with transsexualism which began with Re Kevin.

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