For most of the history of Autism diagnosis, the clinical tools were built on observations of boys. The presentation considered typical was a white, middle-class boy with a particular combination of traits visible to male clinicians. Everyone who did not look like that tended not to be diagnosed.
The cost has fallen hardest on women and AFAB people. We are diagnosed later, often in our thirties, forties, fifties, sixties. Many of us are diagnosed after our own children have been diagnosed, and we see ourselves in the description. Some of us are diagnosed only after the collapse, the burnout that forced the assessment. Many of us are still not diagnosed at all.
Why the tools missed us
The reasons the tools missed us are structural. Autistic girls are often better at masking from a younger age, because the social cost of not masking is higher for girls in most cultures. Autistic women are often read as shy, or anxious, or difficult, rather than as Autistic. Autistic women are often funnelled into mental health diagnoses instead, most commonly anxiety, depression, borderline personality disorder, eating disorders, and complex PTSD. Some of those are accurate. Many are closer to the truth than the no-diagnosis alternative, and many are further from the truth than the Autism frame would have been.
The experience of a late-diagnosed Autistic woman tends to include a specific grief. The years. The therapy that kept working on the wrong frame. The medications that did not land. The relationships where the mismatch was located in her. The career path shaped by limitations that were actually access needs. The version of herself that masked so thoroughly that she lost track of the original.
The grief and the clarity
It also tends to include a specific clarity. A sudden retroactive understanding of everything. The school experiences. The social baffling. The sensory facts of the world. The exhaustion. The reason the life she was told she should want never quite fit.
The rise in adult diagnoses among women is not a spike in the condition. It is the counting, slowly, catching up with the population. Each diagnosis is a correction of a prior error.
If you are wondering
If you are a woman who has been searching for the right frame and keeps encountering diagnoses that almost fit, Autism may be the frame. It often is.