Sex vs. gender — the difference that changes everything

5 min read

This is the most important page in this section. Once the distinction between sex and gender clicks, every other concept — trans identity, intersex bodies, non-binary people, pronouns — becomes much easier to understand.

The two things, separately

Sex refers to the biological characteristics a person is born with: chromosomes, hormones, internal reproductive organs, external genitalia, and secondary sex characteristics that develop at puberty. Most people are categorized at birth as male or female based on a quick visual look at external genitals. A small but meaningful percentage of people are intersex — born with biological sex characteristics that do not fit cleanly into the male or female categories.

Gender refers to the internal sense of being a man, a woman, both, neither, or something else entirely — plus the social roles, expectations, and behaviors a society associates with those categories. Gender includes:

Sex is about the body. Gender is about the self and the social world.

Why people confuse them

In daily life, sex and gender mostly line up. Most people who are assigned female at birth grow up identifying as women and presenting as women. Most people assigned male grow up identifying as men. So in casual speech, “men” and “women” get used to mean both biological categories and social-identity categories, and nobody notices the slip.

The distinction becomes important — and visible — when sex and gender do not line up. A trans woman is someone who was assigned male at birth (sex) but knows herself to be a woman (gender). A trans man is someone assigned female who knows himself to be a man. A non-binary person knows themselves not to be either, regardless of what was assigned.

Without the sex/gender distinction, these experiences sound impossible. With the distinction, they are simply real.

In Arabic, this is harder

Arabic uses the single word جنس (jins) for both “sex” and “gender” depending on context. This makes the distinction harder to talk about in Arabic without explanation. Some modern Arab queer writers use:

The lack of a clean native Arabic distinction is part of why the conversation has been slower to develop in Arabic. It is not a flaw in the language — it just means the language has to grow new vocabulary for new concepts, which is what languages do.

Common misconceptions

“Sex is real, gender is made up.” Both are real. Biological sex is a measurable physical fact (with intersex variations). Gender identity is a measurable subjective fact — it can be reported by the person and observed in their behavior. Neuroscience research has found differences in brain structure correlating with gender identity. The fact that something is internal and subjective does not make it less real than something external and measurable. Pain is internal and subjective. Pain is real.

“If you change your body, you change your sex.” Hormone therapy and surgery change some sex characteristics — secondary sex characteristics, hormone levels, and external genitalia in some surgeries. They do not change chromosomes. Whether or not someone has changed their body, their gender identity is what determines how they should be addressed and treated.

“Gender is just clothing and behavior.” Gender expression is clothing and behavior. Gender identity is something deeper. A trans woman who has not started hormones, has not changed her name, and is still wearing her assigned-male clothing is still a woman. The clothing is expression; the woman is identity.

“Non-binary is a new fad.” Many cultures throughout history have recognized more than two genders: hijra in South Asia, two-spirit in many Indigenous North American nations, fa’afafine in Samoa, mukhannathūn in early Islamic society (see our history guide for the Islamic example). The Western Anglophone vocabulary is recent. The lived reality is ancient.

Why this matters for you

If you have ever felt that the word man or woman did not quite describe you, the sex/gender distinction is the door through which you can examine that feeling honestly. You can be a man with a body that other people read as female. You can be a woman who has not had any medical care. You can be neither, or something in between, or something that does not have a name yet.

Whatever you are, your sex did not assign your identity. You are the only authority on your gender.

See also