Perimenopause
Perimenopause: Symptoms, Stages and What Actually Helps
By Dr. Madeleine Clark, ND, MSCP
You're sleeping worse. Your periods are doing something new. You're more irritable, more tired, and a little foggy, and the things that used to keep you feeling like yourself have stopped working.
If that sounds familiar, perimenopause may be part of the picture. This is our starting point: what's happening, how it's diagnosed, and what actually helps. Each section links to a deeper article if you want to go further.
What is perimenopause?
Perimenopause is the transition leading up to menopause. Menopause is one specific point in time: 12 months in a row without a period. Everything before that, while your cycle and hormones are changing, is perimenopause. Everything after is postmenopause.
When does it start, and how long does it last?
Most people start noticing changes in their mid-to-late 40s. On average, the transition begins around age 47 and the final period comes around 51. Changes in your early 40s aren't unusual. Before 40 they're uncommon, and worth getting checked, since other causes are more likely.
Researchers split the transition into two main stages:[1]
Early transition: your cycle length starts to vary by 7 days or more from month to month. On average this starts around age 47.
Late transition: you go 60 days or more between periods. On average this is around age 49, and it usually lasts a year or two before the final period.
Some people notice symptoms like hot flashes, sleep changes or mood shifts before their cycle changes much. Your experience won't necessarily match the averages, and that's normal.
What's happening with your hormones?
As the number of egg-containing follicles in the ovaries declines with age, the signals between your brain and ovaries start to misfire. Your brain pushes harder, with higher levels of follicle-stimulating hormone (FSH), to get the ovaries to respond.
The result is less a steady decline and more a rollercoaster. Estrogen can swing higher than it used to in some cycles and crash in others. Sometimes a new cycle starts before the last one has finished, which researchers call "luteal out of phase" or LOOP events.[2] That can show up as periods that come close together, heavy or long bleeding, or long gaps with no period at all. Progesterone often drops earlier, because ovulation happens less reliably.
Those swings, more than any single hormone level, drive many perimenopause symptoms.
How is perimenopause diagnosed?
If you're over 45 with typical symptoms, perimenopause is diagnosed from your symptoms and your cycle. You usually don't need hormone blood tests.[3] Hormones swing so much day to day that a single test rarely changes the plan, and a "normal" result doesn't rule perimenopause out.
If you're under 45, or your symptoms aren't typical, testing can help rule out other causes. And bloodwork is still useful for things that can look like perimenopause or add to it, like iron, thyroid, blood sugar and cholesterol.
Common symptoms, and where to learn more
Sleep
Trouble falling asleep, 3am waking and night sweats are some of the most common complaints. The good news: there are treatments with strong evidence, and sleep hygiene alone isn't one of them. → Can't Sleep in Perimenopause? What Actually Helps
Hot flashes and night sweats
Most people get them at some point, and they often last longer than people expect. In a large US study, the median was about 7 years.[4] → Hot Flashes Explained → Hot Flashes and Mood: The Sleep Connection → Acupuncture for Hot Flashes: What the Research Shows
Mood, anxiety and not feeling like yourself
The risk of depression goes up during the transition, even in people who've never had it before. The risk is higher if you've had PMS, PMDD or postpartum depression.[5] → Why Do I Not Feel Like Myself in Perimenopause? → Depression and Anxiety in Perimenopause → Burnout vs Perimenopause → ADHD and Perimenopause
Brain fog
Forgetting words, losing your train of thought, walking into rooms and wondering why. It's real, it's common, and for most people it improves after the transition. → Brain Fog in Perimenopause → Dementia Prevention in Midlife
Weight, body composition and joint pain
Even when the scale barely moves, body composition shifts: fat mass tends to go up, lean mass goes down, and more fat settles around the middle.[6] Many people also notice new aches, stiffness and slower recovery. → Menopause and Weight → Musculoskeletal Syndrome of Menopause → GLP-1 Medications and Weight in Midlife
Periods and contraception
Cycles can get shorter, longer, heavier or unpredictable. And yes, you can still get pregnant in perimenopause, so contraception still matters until menopause is confirmed. → Oral Contraceptive Pill vs. Hormone Therapy
Vaginal, bladder and sexual health
Dryness, discomfort with sex, more frequent UTIs and changes in desire are common, and very treatable. Unlike hot flashes, vaginal and bladder symptoms tend to continue or worsen over time without treatment. → Genitourinary Syndrome of Menopause (GSM): What You Need to Know → Is Vaginal Estrogen Safe? → The Changing Models of Desire: Why Libido Looks Different in Perimenopause
Bones, skin and hair
Bone loss speeds up around the final period, which makes midlife a key time to think about bone health. Skin and hair changes are common too. → Osteoporosis → Hair Loss in Menopause
Alcohol
Many people notice drinks hit harder than they used to, and it can make sleep, hot flashes and mood worse. → Why Alcohol Hits Different in Perimenopause
Not ready to book yet? Start with our free perimenopause guide: what's happening, what actually helps, and what to ask for at your next appointment.
What actually helps
There's no single fix, and a good plan depends on which symptoms bother you most. The main options:
Lifestyle foundations. Sleep, movement (especially strength training), nutrition, alcohol and stress. These aren't a replacement for treatment, but they shape how you feel now and your heart and bone health later.
Targeted treatment for specific symptoms. For example, cognitive behavioural therapy for insomnia (CBT-I) for sleep, or therapy for mood.
Supplements, chosen for your specific symptoms and backed by evidence, with an eye on interactions.
Hormone therapy. It's the most effective treatment for hot flashes and night sweats, and it helps with vaginal symptoms and bone loss. For most healthy people under 60 or within 10 years of menopause, the benefits outweigh the risks.[7] It isn't recommended for the sole purpose of preventing heart disease. Whether it's right for you depends on your symptoms, history and preferences. → Hormone Therapy 101
Non-hormonal medications for hot flashes, mood or sleep, when hormone therapy isn't right for you or isn't enough.
When to get checked
Book in with your doctor or a practitioner if symptoms are affecting your sleep, work, relationships or quality of life. You don't need to wait until you're exhausted.
Get seen promptly for:
Very heavy bleeding (soaking a pad or tampon every hour or two), or bleeding that leaves you dizzy or short of breath
Bleeding between periods or after sex
Any bleeding after 12 months without a period
Low mood that isn't lifting, or any thoughts of self-harm
How we can help
Most people come to us wanting two things: their energy back, and a clear path forward. Here's what that path looks like:
Free 15-minute meet and greet. A quick call to see if we're a good fit. No pressure.
Your first visit (75 minutes). Your cycle, symptoms, history, medications, contraception and goals. You leave with a written plan to start on right away: lifestyle, supplements, and hormone therapy if it's right for you. We also order bloodwork where it will change the plan, like iron, thyroid, cholesterol and blood sugar.
Results review. We go through your bloodwork together and fine-tune your plan based on what it shows.
Response check (around 6 weeks). We catch side effects early and adjust, so a small problem in week three doesn't derail the whole plan.
Response check (around 6 weeks). We catch side effects early and adjust, so a small problem in week three doesn't derail the whole plan.
Three-month review. We compare your symptoms against where you started, so you can see what's actually working.
Ongoing care. Bone health, heart and metabolic health, and an annual review. Most patients see us about 4 times a year.
Book a free 15-minute meet and greet →
We see patients in Toronto and virtually across Ontario.
This article is for general education and isn't a substitute for personalized medical advice.
References (click to expand) ▾
- Santoro N, Roeca C, Peters BA, Neal-Perry G. The menopause transition: signs, symptoms, and management options. Journal of Clinical Endocrinology & Metabolism. 2021;106(1):1-15.
- Hale GE, Hughes CL, Burger HG, Robertson DM, Fraser IS. Atypical estradiol secretion and ovulation patterns caused by luteal out-of-phase (LOOP) events underlying irregular ovulatory menstrual cycles in the menopausal transition. Menopause. 2009;16(1):50-59.
- National Institute for Health and Care Excellence (NICE). Menopause: identification and management (NG23). Updated 2024.
- Avis NE, Crawford SL, Greendale G, et al. Duration of menopausal vasomotor symptoms over the menopause transition. JAMA Internal Medicine. 2015;175(4):531-539.
- Maki PM, Kornstein SG, Joffe H, et al. Guidelines for the evaluation and treatment of perimenopausal depression: summary and recommendations. Menopause. 2018;25(10):1069-1085.
- Greendale GA, Sternfeld B, Huang M, et al. Changes in body composition and weight during the menopause transition. JCI Insight. 2019;4(5):e124865.
- The 2022 hormone therapy position statement of The North American Menopause Society. Menopause. 2022;29(7):767-794.