Perimenopause is the hormonal transition before menopause, when the ovaries gradually produce less estrogen and progesterone. It usually begins in the mid-to-late 40s and lasts around four years on average. Most of what people call "menopause symptoms" — hot flashes, broken sleep, mood shifts, brain fog — actually happen during perimenopause, not after it.

Perimenopause is the transition phase. Menopause is a single point in time — the day that marks twelve consecutive months without a period. You can only confirm it looking back. Everything before that day is perimenopause; everything after is postmenopause.

Most women enter perimenopause in their mid-to-late 40s. The average age of menopause in the U.S. is 51 (NAMS), so perimenopause often begins around 45–47 — though it can start in the late 30s or early 40s. Menopause before age 40 is called premature ovarian insufficiency and is worth discussing with a doctor.

About four years on average, but the range is wide — anywhere from one to ten-plus years. The final stretch before menopause tends to bring the most frequent and intense hot flashes. Once you cross the twelve-month mark, you're postmenopausal.

The most reported are irregular periods, hot flashes, night sweats, disrupted sleep, mood changes such as irritability and anxiety, brain fog, lower energy, vaginal dryness, and changes in libido. Around 80% of women experience hot flashes or night sweats during the transition (NAMS).

Yes. Trouble concentrating, losing words mid-sentence, and memory lapses are documented. The SWAN study measured real declines in verbal memory and processing speed during the transition. For most women, cognition returns to its earlier baseline in postmenopause.

Several things stack up at once: night sweats wake you physically, falling estrogen and progesterone change sleep architecture, anxiety makes it harder to drift off, and sleep apnea risk rises in midlife. Studies estimate 40–60% of perimenopausal women have clinically significant sleep disturbance — which is exactly why tracking sleep alongside symptoms is so revealing.

Yes. Hormonal fluctuations directly affect the brain systems that regulate mood, so increased irritability, anxiety, or low mood are common — often strongest in the days before a period. Women with a history of PMS or mood conditions may feel it more. These changes are physiological, not "all in your head."

Perimenopause is diagnosed from symptoms and history, not a single blood test. A couple of months of consistent data lets your clinician make a faster, more accurate assessment than a from-memory summary ever could — and it helps you see your own patterns and triggers along the way.

The Pause covers the data points that matter most: symptoms (including hot flashes and energy), sleep, mood, daily check-ins, and more across eight trackers. Symptom severity is kept simple and honest — mild or impactful — so logging stays quick. If you wear an Apple Watch, sleep can flow in automatically and sit side by side with your own notes.

It replaces a subjective recap with objective data over time. Your My Insights report shows symptom frequency, severity trends, and sleep patterns month by month and day by day — formatted so a clinician can read it in under a minute and spend the appointment on you, not on reconstructing the timeline.

Aim for two to three months of consistent logging. That's enough to show how your cycle and symptoms vary, rather than a single week's snapshot. That said, don't wait if symptoms are affecting your quality of life — log what you can and start the conversation.

Harmoni® is the AI companion built into the app. She supports you with noticing the patterns in your tracking — sleep, symptoms, mood, energy — and turns them into plain-language insights and gentle, midlife-specific guidance. Think of her as a knowledgeable companion who already knows your data, available whenever you check in.

My Insights generates a clean PDF — monthly and day-by-day — covering your symptoms, severity trends, and sleep. It's built for clinical readability so your doctor can scan it at the start of a visit and act on it.

Yes — the Pause is available on both iOS and Android. Scan the code on our app page or search your store to download.