There is a sentence women say quietly, usually near the end of an appointment, usually while reaching for a coat: I think there is something wrong with my brain. The measured answer is more reassuring and more precise than either the fear or the dismissal. Women in late perimenopause stopped improving on repeated cognitive testing while every other group carried on, and then the curve came back. But underneath that sits a second question, about ADHD in this window, where a systematic review went looking for studies and found none.

You're mid-sentence, four hours since your last meal, and your brain just — stops. Not dramatically. You lose the thread. Then someone puts food in front of you and you're back, embarrassingly quickly. Here's what is actually happening in your prefrontal cortex. And here's the part that matters even more: the myth that the luteal phase makes you cognitively impaired is not supported by a 2025 meta-analysis of 102 studies and 3,943 women. The fog is real. The explanation isn't what you've been told.