How do I know if I'm in perimenopause?

One of the earliest, most measurable signs is cycle-length change: a persistent difference of 7 or more days between consecutive cycles marks the early transition. Later, gaps of 60 days or more between periods signal the late transition. Most people enter perimenopause in their 40s, often alongside symptoms like hot flushes, sleep changes, or mood shifts — but the changing cycle length is the part you can actually track.

Why are my cycles getting longer in my 40s?

As ovulation becomes less regular, the hormonal rhythm that sets cycle length loosens, so cycles tend to lengthen and space out. It's the expected pattern of the menopausal transition, not a malfunction. Watching the trend — cycles drifting from, say, 30 to 38 to 47 days — is more meaningful than any single month.

Can I still get pregnant during perimenopause?

Yes. Ovulation becomes unpredictable rather than stopping cleanly, so pregnancy is still possible until you've gone 12 consecutive months without a period (the definition of menopause). If you're avoiding pregnancy, keep using contraception through the transition — an app's cycle estimate is not reliable here.

When is bleeding during perimenopause worth a doctor's visit?

Check in for very heavy bleeding (soaking through protection hourly), bleeding that lasts much longer than usual, bleeding between periods or after sex, and — importantly — any bleeding at all once you've had 12 months with no period. Postmenopausal bleeding always warrants prompt evaluation.

Tracking your cycle through perimenopause: a calm guide

In perimenopause, cycles lengthen and space out — that drift is the signal, not a glitch. Here’s what the transition stages mean, what’s normal, and how tracking the trend helps.

Short answer: perimenopause is the years-long transition before menopause, and its defining feature is that your cycles get variable — longer, then spaced further apart, then absent. A tracker that keeps trying to predict an exact period will only frustrate you here. What actually helps is watching the trend: cycles drifting longer over time is the whole story, and it’s a normal one.

What perimenopause is

Perimenopause is the “around menopause” stretch — typically starting in the 40s and lasting anywhere from a couple of years to a decade. Ovulation grows less regular, estrogen and progesterone swing more, and the steady monthly rhythm of earlier decades loosens. Menopause itself is a single point defined in hindsight: 12 consecutive months with no period. Everything before that 12-month mark is the transition.

The stages, in plain terms (STRAW+10)

Researchers map the transition with a framework called STRAW+10, and two of its markers are genuinely trackable from your own cycle log:

Early transition: a persistent difference of 7 or more days between the lengths of consecutive cycles. Your periods are still coming, but the spacing has become noticeably uneven.
Late transition: an interval of 60 or more days — a skipped period or two. Gaps lengthen and become the norm.
Menopause: reached once you’ve had 12 months with no period at all.

These thresholds are why a smart tracker can tell you something real — “your cycles are spacing out” — instead of pretending it can still name a date.

Why predictions break here — and why that’s fine

Period predictions lean on your cycle being reasonably consistent. In perimenopause that consistency is exactly what’s fading, so a confident countdown isn’t just unhelpful — it’s misleading. (The underlying reason any prediction wobbles is covered in why your period tracker keeps getting the prediction wrong.) The honest response is for the app to stop forecasting a precise date and start reflecting the trend back to you.

What’s normal in the transition

Cycles getting longer, shorter, or simply unpredictable month to month.
Skipped periods, then more frequent skips.
Flow changing — lighter some months, heavier others.
Symptoms like hot flushes, disturbed sleep, and mood shifts coming and going.

How tracking actually helps

Through perimenopause, the value of tracking flips from prediction to perspective. A running view of your recent cycle lengths — 31, 36, 44 days — shows the drift at a glance, which is reassuring when you understand it and useful to share with a clinician. That’s the idea behind Dew’s menopause mode: instead of a countdown, it keeps tracking and surfaces the spacing-out trend calmly, and notes when it’s likely you’ve reached menopause. If your cycles are unpredictable for any reason, the same calm tooling applies — see the best tracker for irregular cycles.

The bottom line

Perimenopause isn’t your cycle breaking — it’s your cycle changing, on a timeline that can last years. Track the trend rather than the date, expect the spacing to widen, keep using contraception if you need it until the 12-month mark, and treat any post-menopausal bleeding as a reason to get checked. Watched this way, the transition becomes legible instead of unsettling.

Your cycle history through this stage is personal — Dew keeps it on your device, never sold, and you can read the rest of the science calmly in the cycle guide.