Last updated 2026-07-19
How Irregular Is Too Irregular? Perimenopause and Your Cycle
Cycle changes are one of the earliest and most common signs of perimenopause, and the honest answer to "is this normal" is that the range of normal is wide. According to The Menopause Society, changes happen because of the ovaries' erratic hormone production and less frequent ovulation, not a single steady decline.
What a typical progression looks like
Cycle changes tend to move through recognizable stages, though not on a fixed schedule. Early on, cycles often become a little shorter than usual, with bleeding duration and flow varying. As perimenopause progresses, cycle length may vary by seven days or more from one cycle to the next. Later in the transition, occasional skipped periods can progress to missing 60 days or more between cycles. None of that is a straight line, and it doesn't happen on the same timeline for everyone.
How much variation is actually normal
This is the part that's easy to miss: what counts as a normal cycle varies a lot from person to person to begin with, which is exactly why the same seven-day shift can be unremarkable for one person and a genuine change for another. The Menopause Society's own guidance is direct about what to do with that uncertainty: track your bleeding patterns, so that if you do need to discuss changes with a clinician, you have your own real pattern to bring, not a guess from memory.
Why tracking your own pattern is the actual recommendation here
This is one of the few symptoms where the research itself, not just Liora's own framing, points straight at tracking as the useful next step. A cycle log kept over months tells you and a clinician far more than trying to recall "was my last period late" weeks after the fact. That's exactly what Liora's daily log builds toward: your own cycle pattern, in your own data, ready to bring to that conversation rather than reconstructed from memory.
This article describes general patterns from published research. It is not medical advice, diagnosis, or a treatment recommendation, and Liora is not a medical device. Significant changes such as very heavy bleeding, bleeding between periods, or bleeding after 12 months without a period should be evaluated by a qualified clinician. This article, and Liora's own weekly insights, exist to make that conversation more concrete, not to replace it.