AFAB
Assigned female at birth: a fact about a birth certificate, not an identity.
AFAB stands for assigned female at birth. It describes what a doctor wrote on a form after looking at a newborn, and nothing else. It is a fact about paperwork, not a fact about the person that paperwork was filed for.
The term exists because the older phrasing was doing damage. Saying someone was born a girl treats the label as the truth and the person as the deviation. Assigned female at birth puts the verb where it belongs: somebody assigned it, and assignments can be wrong.
It is used most often as background, not as an identity. A trans man is AFAB. So is a nonbinary person who has never medically transitioned, and so is a cis woman. Knowing someone is AFAB tells you what happened in a delivery room and nothing about how they live now.
The word travels in a pair with AMAB, assigned male at birth. Intersex people complicate both, because the assignment in their case is often a decision made under pressure, sometimes surgically, and the word assigned carries a much heavier meaning.
It is not a polite way to say woman. This is where it gets misused most. When someone reaches for AFAB to talk about a group of women without saying women, or to sort trans people into their birth categories with a newer vocabulary, the term has been turned into exactly what it was built to replace.
Most people do not describe themselves this way in daily life. It shows up in medical contexts, in research, and in conversations where the history is actually relevant. In a dating profile it usually is not, and its presence often says more about who the profile is written for than about the person writing it.
AFAB is not a gender, and it is not a softer word for woman
The most common mistake is treating AFAB as a category of person rather than a note about their birth records. It gets used to mean woman-adjacent, or to build a group that includes trans men and nonbinary people alongside cis women on the basis of shared anatomy. That regroups people by what they were assigned, which is the thing the word was invented to stop doing.
The tell is whether the term is doing work that could not be done another way. Discussing cervical screening, it is precise and useful. Describing who someone is attracted to, or who belongs in a space, it is standing in for a claim the speaker does not want to make out loud.
Saying it well
Say this
- I am AFAB, but I am not a woman.
- AFAB and AMAB people both need this screening.
- For medical history: I was assigned female at birth.
- My chart says AFAB. My name does not.
Not this
- AFABs (as a noun, for a group of people)
- Are you AFAB or AMAB? (asked on a first message)
- This space is for AFAB people (meaning: for women)
- Biologically AFAB
Questions people actually ask
What does AFAB mean?
Assigned female at birth. It records what was written down when someone was born, based on a quick look at a newborn. It says nothing about that person's gender, body as an adult, or how they live.
Is AFAB the same as being a woman?
No. Cis women are AFAB, and so are trans men, nonbinary people and plenty of others who are not women. The word describes an assignment, not a gender, and using it to mean woman defeats its purpose.
What is the difference between AFAB and AMAB?
Only which label was assigned. AFAB is assigned female at birth, AMAB is assigned male at birth. They are two halves of the same shorthand and carry the same limits.
Is it rude to ask someone if they are AFAB?
Usually, yes, unless you are their doctor. Asking is asking what was between their legs at birth, which is a question about anatomy dressed in an acronym. If the history is genuinely relevant, people tend to volunteer it.
Can a cis person be AFAB?
Yes. A cis woman was assigned female at birth and agrees with the assignment. The term applies to everyone, which is part of why it is useful and part of why it is not an identity.