Genetic factors typically define a person’s sex, but gender refers to how they identify on the inside. Some examples of gender identity types include nonbinary, cisgender, genderfluid, male, female, transgender, gender neutral, agender, and pangender.

Only an individual can determine their own gender identity, and it does not need to be fixed.

This article will discuss what gender identity is, some definitions of different gender identities, and where people can find support. It will also look at how gender exists on a spectrum.

The term gender identity refers to the personal sense of an individual’s own gender.

Because a person’s sex and gender identity do not have to be the same, it is important to know the difference between them.


A person’s gender is how they identify internally and how they express this externally. People may use clothing, appearances, and behaviors to express the gender that they identify with.

The World Health Organization (WHO) note that gender is a social construction that people typically describe in terms of femininity and masculinity. In Western cultures, people associate femininity with women and masculinity with men, but this social construction varies across cultures.

However, gender is not neatly divided along the binary lines of “man” and “woman.”


A person’s sex is typically based on certain biological factors, such as their reproductive organs, genes, and hormones.

Like gender, sex is not binary. A person may have the genes that people may associate with being male or female, but their reproductive organs, genitals, or both may look different.

This is called differences in sex development. People may also refer to differences in sex development as intersex.

People typically use the terms “male,” “female,” or “intersex” to refer to a person’s sex.

Learn more about the difference between sex and gender here.

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The concepts and terms that refer to gender identity continually change, as our perceptions evolve.

The term “gender identity” first appeared in the 1960s. It referred to a person’s inner sense of belonging to the category of male or female. In time, the term came to include people who identify in other ways. It refers to a person’s own sense of their gender, regardless of the sex a doctor assigned to them at birth.

Some terms, such as “transsexual,” have also changed meaning over time. In the past, this term referred only to people who had undergone certain medical procedures, such as a mastectomy or phalloplasty. The meaning of this term has since broadened to include people moving toward or having a gender identity that is different from the one assigned to them at birth.

Other language has changed in terms of acceptability. The term “queer,” for example, was historically used as a slur against people who did not conform to expectations about gender expression or identity. Now, some people have reclaimed it. It can be acceptable in some circumstances but offensive if people use it inappropriately.

It is also important to note that gender identify may not fit into a category. Labels may help a person understand their identify, but gender identities are not always classifiable in these ways. As people come to perceive their gender identity in new ways, they may find that no single term defines it. Or, they may identify in several ways.

A person’s gender identity is not restricted to being either a man or a woman. Some people do not identify with any gender, while others identify with multiple genders.

According to The Trevor Project, a person’s gender can consist of the following.

Gender identity

This term refers to the personal sense of an individual’s own gender.

Some people identify as a man, while others identify as a woman. Others may identify as neither, both, or somewhere in-between.

Gender expression and presentation

This refers to how a person expresses themselves to others and how they want the world to see them.

A person may present themselves as wholly masculine or wholly feminine. Or, a person may present themselves as androgynous or nonbinary.

Gender expression and presentation involve aspects such as mannerisms, clothing styles, names, and pronoun choices, to name a few.

Here, learn more about gender pronouns.

The following are some gender identities and their definitions.


A person who is agender does not identify with any particular gender, or they may have no gender at all.

Other terms for this may include:

  • neutral gender
  • null-gender
  • genderless
  • neutrois


A person who identifies as androgyne has a gender that is either both masculine and feminine or between masculine and feminine.


A person who identifies as bigender has two genders.

People who are bigender often display cultural masculine and feminine roles.


Women, especially lesbians, tend to use this term to describe the way they express masculinity, or what society defines as masculinity.

However, the LGBTQIA Resource Center state that “butch” can also be a gender identity in itself.


A cisgender person identifies with the sex that they were assigned at birth.

For example, a cisgender woman is someone who still identifies with the sex — female, in this case — a doctor assigned them at birth.

Gender expansive

The LGBTQIA Resource Center define gender expansive as an “umbrella term used for individuals who broaden their own culture’s commonly held definitions of gender, including expectations for its expression, identities, roles, and/or other perceived gender norms.”

Those who are gender expansive include people who are transgender and people whose gender broadens the surrounding society’s notion of what gender is.


A person who identifies as genderfluid has a gender identity and presentation that shifts between, or shifts outside of, society’s expectations of gender.

Gender outlaw

A person who identifies as a gender outlaw refuses to allow society’s definition of “male” or “female” to define them.


A person who identifies as genderqueer has a gender identity or expression that is not the same as society’s expectations for their assigned sex or assumed gender.

Genderqueer can also refer to a person who identifies outside of how society defines gender or someone who identifies with a combination of genders.

Masculine of center

A person who uses this term is usually a lesbian or a trans person who leans more toward masculine performances and experiences of gender.


A person who identifies as nonbinary does not experience gender within the gender binary.

People who are nonbinary may also experience overlap with different gender expressions, such as being gender non-conforming.


A person who identifies as omnigender experiences and possesses all genders.

Polygender and pangender

People who identify as polygender or pangender experience and display parts of multiple genders.


This is an umbrella term that encompasses all people who experience and identify with a different gender than that which their assigned sex at birth would suggest.

Although most people think of trans men and trans women when hearing the word transgender, this term also encompasses people who identify as a gender other than man or woman, including nonbinary and genderfluid.


Trans is a more inclusive term that covers those who identify as nonbinary and those who are genderless, according to the LGBTQIA Resource Center.

Two Spirit

Two Spirit is an umbrella term that encompasses different sexualities and genders in Indigenous Native American communities.

There are many different definitions of Two Spirit, and Indigenous Native American people may or may not use this term to describe their experiences and feelings of masculinity and femininity.

This is a cultural term that is reserved for those who identify as an Indigenous Native American.

LGBTQIA+ resources

To discover more evidence-based health information and resources for LGBTQIA+ individuals, visit our dedicated hub.

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Not everyone is accepting of people with diverse gender identities, which can have a negative impact on a person’s mental health.

However, there are multiple websites and online communities that people can turn to for support. These include:

Here are some questions that people might ask about gender identity.

How many gender identities are there?

There is no fixed number of gender identities. They occur on a spectrum, which really means that the possibilities are infinite. Each person might find that a certain point on the spectrum feels most comfortable and accurate, and this may change over time.

People do not know precisely what influences gender identity. Some genetic factors and factors that a person is born with may play a role.

What influences gender identity?

Various factors play a role, including socialization and our own choices. Gender roles and traits are dynamic, which means that they can change. Whether a healthcare professional identifies a baby as male or female at birth does not go on to define that person’s gender identity.

How can I know my gender identity?

The first step is to figure out what gender identity, gender expression, sexual orientation, and sex assigned at birth mean and see how you feel about these ideas.

Then, think about the spectrum of gender identities and where you might feel comfortable. Maybe speak with friends of various gender identities for inspiration.

And keep in mind that there is no need for any specific label. You might want to go without a label or even create your own.

A person’s gender identity is not always the same as their biological sex, nor their assumed gender based on their assigned sex. It depends on how they identify as a person, and this can change over time.

People can identify as more masculine, more feminine, a combination of both, or neither. How a person expresses or describes their gender is personal to them.