Is This Perimenopause? A Physician’s Cycle-Tracking Self-Check
If you have been told you are too young, or that your bloodwork was normal, or that this is just stress — this guide is about the evidence you can gather yourself that is more reliable than either of those answers.
Perimenopause is staged by your cycle pattern, not by a blood test. The formal marker for the start of the transition is a persistent difference of 7 days or more between consecutive cycle lengths. A single FSH level cannot diagnose it, because FSH swings wildly month to month during exactly the years you would be testing it.
Get the printable guide and 12-month cycle tracker
A twelve-month grid for recording the date each period starts, so the cycle-length differences calculate themselves — plus the symptom record, the questions to ask, and the treatment options laid out honestly. This is the one piece of evidence about perimenopause that only you can gather. Enter your email to read and download it. We send the guide and occasional articles on period health. Unsubscribe any time. We never sell your information.
Board-certified obstetrician-gynecologist, licensed in Colorado. Staging per the Stages of Reproductive Aging Workshop +10; bleeding evaluation current to ACOG’s April 2026 guidance.