Health & Nutrition

What Is Perimenopause? Symptoms, Age, Timeline, and What to Do Next

Perimenopause can be a confusing time, especially when your period, sleep, mood, and body all seem to be changing all at once. You might be wondering:

  • What is perimenopause?
  • When does perimenopause start?
  • How long does perimenopause last?
  • Can you get pregnant during perimenopause?

Perimenopause is the transition phase before menopause, when your hormones start to fluctuate and your menstrual cycle becomes less predictable. It’s the time in which a woman’s body prepares to stop having periods.1  

The phases of menopause (perimenopause, menopause, and postmenopause) often get lumped together as being “menopause,” but they are distinct.2

  • Perimenopause: The transition that generally starts around 8-10 years before menopause, when your estrogen levels start to decrease, periods become irregular, and symptoms such as hot flashes, mood changes, and sleep problems are common.
  • Menopause: The point at which your menstrual cycle officially ends, after 12 months in a row with no period that has not been caused by another medical problem. At this point, your ovaries have stopped releasing eggs and estrogen production has decreased significantly. It also means you can no longer get pregnant.
  • Postmenopause: The stage after menopause. Many menopause symptoms lessen during this time, but mild symptoms may continue for years. Because estrogen levels are low, the risk of osteoporosis and heart disease increases during this time.

When does perimenopause start?

Perimenopause usually starts several years before menopause, as your ovaries gradually produce less estrogen and ovulation becomes less predictable. This transition often begins 8-10 years before menopause.

If you’re wondering, “What age does perimenopause start?” there is a typical range, but the exact age is individual, influenced by genetics, health history, and lifestyle.

For most women, perimenopause typically starts in their 40s. However, symptoms can begin anytime from your late 30s to your early 50s.

Can perimenopause start in your 30s?

Yes, perimenopause can start in your 30s, although it’s less common. Unfortunately, because it is less common, symptoms of perimenopause may be blamed on other causes, such as stress, poor nutrition, or depression.3

What can make it start earlier?

Some factors are linked to earlier perimenopause and menopause:4

  • Family history of early menopause: If your mother, sisters, or close relatives had menopause at a younger age, you may be more likely to experience it earlier. That means that perimenopause can arrive earlier as well.
  • Cancer treatment: Chemotherapy and pelvic radiation can damage the ovaries and may lead to perimenopause, with earlier or sudden menopause as a result.
  • Surgery involving reproductive organs: Removal of both ovaries (oophorectomy) causes immediate menopause, no matter your age. Removing one ovary can shorten perimenopause and lead to menopause coming earlier.
  • Hysterectomy (removal of the uterus) with ovaries taken out will also result in immediate menopause.
  • Smoking or use of tobacco products: Smoking has been associated with earlier perimenopause or menopause as compared to non-smokers.5

What causes perimenopause?

Perimenopause is a completely natural process that occurs as you age and your body shifts from regular ovulation and menstrual cycles toward menopause. It’s the beginning of the end of your potential reproductive years.

During perimenopause, your ovaries produce less estrogen and progesterone, which can cause symptoms such as hot flashes, brain fog, and mood swings. Additionally, ovulation becomes more irregular. You may ovulate some months but not every cycle, and your menstrual cycle might lengthen from 28 days to 35 days. Flow can also be erratic, with periods being early, late, heavy, light, or skipped entirely. 

Common signs and symptoms of perimenopause

Symptoms of perimenopause are caused by changing hormone levels in the body. For example, low estrogen levels may cause night sweats or hot flashes. Your exact symptoms will depend on your hormone levels.6

The most common symptoms

The most common symptoms of perimenopause are also usually the first signs of it. These include changes in your period, hot flashes, night sweats and sleep disturbances, mood changes, brain fog, and weight gain. These symptoms are sometimes called the “34 symptoms of perimenopause” in popular media. Not everyone will experience all symptoms, but having multiple signs often suggests perimenopause.

What are the “34 symptoms of perimenopause”?

  • Cycle + bleeding changes

1.       Irregular periods

  • Vasomotor symptoms

2.       Hot flashes

3.       Night sweats

  • Sleep + energy

4.       Sleep disturbances

5.       Fatigue

  • Mood + cognition

6.       Mood swings/mood changes

7.       Irritability

8.       Depression or anxiety

9.       Migraines or headaches

10.  Dizziness or light-headedness

11.  Brain fog/difficulty concentrating

12.  Memory lapses

13.  Panic disorder

  • Body changes

14.  Weight gain or changes in body composition

15.  Hair thinning or changes in hair texture

16.  Skin changes (dryness, loss of elasticity)

17.  Joint pain or stiffness

18.  Decreased bone density

19.  Increased risk of cardiovascular disease

20.  Breast tenderness, soreness, or changes

21.  Palpitations or irregular heartbeat

22.  Digestive issues (bloating, indigestion, constipation)

23.  Tingling hands, feet, arms, and legs

24.  Burning mouth

25.  Changes in sense of taste

26.  Muscle aches and tension

27.  Sensations resembling electric shock

28.  Itchiness

29.  Brittle nails

30.  Allergies

  • Genitourinary (dryness, urinary urgency)

31.  Vaginal dryness

32.  Reduced libido

33.  Urinary frequency or increased risk for a urinary tract infection

34.  Urinary incontinence

How long does perimenopause last?

Perimenopause doesn’t have a fixed length, so the answer to “how long does perimenopause last” will vary from woman to woman. Most experts state that perimenopause typically lasts anywhere from 2-8 years. At least one study, published in JAMA Internal Medicine, suggested that health-care professionals “counsel women to expect that frequent VMS (vasomotor symptoms, such as hot flashes and night sweats) could last more than seven years, and they may last longer for Black women.”7

Your own timeline depends on factors such as genetics, health, and how your ovaries gradually slow down hormone production.

Early vs. late perimenopause

Perimenopause can be broken into two phases:

  • Early perimenopause: Periods still occur, but cycles might be a bit shorter or longer than usual, and flow might have changed. You might also notice minor symptoms such as worsening PMS, new sleep issues, subtle mood shifts, or occasional hot flashes or night sweats.
  • Late perimenopause: Cycles are much more irregular, with some lasting 60 days or more. You might skip several periods and then have a much heavier flow. You might also experience more noticeable or frequent symptoms such as hot flashes and night sweats, sleep disruption, vaginal dryness, brain fog, and mood changes.

Perimenopause and your period (what’s normal vs. when to call a medical professional)

While irregular periods, hot flashes, and mood changes are common in perimenopause, there are important red flags to watch for. If these arise, it may be time to contact a healthcare professional, such as a gynecologist.

For example:

  • Heavier flow is normal, but bleeding that lasts longer than 10 days, occurs between periods, or is dramatically different from your normal flow is a sign to contact a healthcare practitioner.
  • Hot flashes followed by chills or disruption to sleep patterns are normal. If your hot flashes start before age 40 or are so severe that they cause fainting or interfere with your daily life, seek medical assistance.
  • Emotional changes and increased irritability are normal. Persistent sadness, anxiety that interferes with daily life, and thoughts of self-harm likely require medical intervention.

If you experience sudden or severe depression8 or anxiety, chest pain, heart palpitations, fainting episodes, repeated bleeding after intercourse, bleeding after menopause (after you’ve gone 12 months without a period), or sudden and unusual pelvic pain, contact a medical professional.

Can you get pregnant during perimenopause?

Yes, you can get pregnant during perimenopause. Your body is still ovulating during this time, even if it is less consistent. Until you’ve gone a full 12 months without a period, you are still ovulating, and pregnancy is possible.

How is perimenopause diagnosed? (And are there tests?)

Perimenopause is a clinical diagnosis.9 This means it’s based on your symptoms, health history, and age as opposed to lab results. While there isn’t a single definitive test to show you’re experiencing perimenopause, a health-care professional may order blood tests to check your hormone levels. They may also request ultrasounds or biopsies to rule out other causes of your symptoms.

What helps with perimenopause symptoms?

While there’s no way to stop perimenopause itself, there are ways to manage the symptoms so you feel like yourself and protect your long-term health. If you’re also wondering how to lose weight during perimenopause, the same foundations that ease symptoms often help with weight and energy.

Lifestyle foundations

Start first with some lifestyle foundations, such as regular movement (especially a mix of walking and cardio plus strength training). This can help with mood, sleep, hot flashes, and long-term health. Eat mostly whole foods and cut back on ultra-processed foods, added sugars, and alcohol, which can affect your sleep.

Use a consistent sleep schedule, a cool, dark bedroom, and a calming sleep routine to help combat sleep symptoms. Finally, consider stress-management tools such as walks, mindfulness, and therapy to help with mood and anxiety.

Weight changes: What’s actually happening

Hormone shifts, age-related muscle loss, interrupted sleep, and stress all make it harder to regulate your weight, especially around the abdomen. A higher waist circumference is a risk factor for cardiovascular and metabolic diseases in menopausal women.10 Additionally, the decreased circulation of estrogen throughout the body can cause issues with osteoporosis that manifests as low bone density and a higher risk of fractures.

Some of the risk factors can be managed by drinking more water, and incorporating foods rich in calcium, iron, and vitamin D.

Nutritional supplement support for perimenopausal women 

Nutrients can help support you as you address some of the symptoms of perimenopause.11

  • Magnesium can regulate hormones such as melatonin, which can improve sleep quality and reduce stress.*
  • Omega-3 fatty acids can support cardiometabolic health by helping maintain already normal triglyceride levels and promoting optimal circulation.*
  • Vitamin D supports bone density and muscle health.*
  • Creatine supports upper and lower body strength and cognitive function.12 It also helps with bone health.*
  • Finally, calcium supports strong bones throughout life.*
  • Vitamin K supports bone and cardiovascular health.*

In addition to individual nutrients, Thorne offers a botanical formula – Perimenopause Complete – to address the most common and some of the less common symptoms of perimenopause.* If low libido is an issue, we have you covered there too. Women’s Libido Boost pairs well with Perimenopause Complete to support libido and improve vaginal dryness.*

A quality multi-vitamin/mineral formula, such as Women’s Multi 50+ by Thorne, will address nutrient gaps and enhance bone support and cardiovascular support.*

Perimenopause and menopause FAQs

What is perimenopause?

Perimenopause is the transition period before menopause when your hormone levels start to fluctuate, and your menstrual cycle becomes less predictable. Ovulation becomes more erratic, periods often change in timing or flow, and symptoms such as hot flashes, sleep problems, and mood shifts may appear. It ends once you reach menopause – the point as which is has been 12 months since you had a period.

When does perimenopause start?

Perimenopause generally starts 8-10 years before menopause, most often in your 40s. However, it can begin earlier or later. Some people notice changes in their late 30s, while others don’t enter perimenopause until their early 50s. The exact timing varies based on genetics, health, and lifestyle.

How long does perimenopause last?

Perimenopause can last anywhere from a few months to several years. Most medical sources estimate a typical duration of 2-8 years, depending on the individual. You’re considered to have reached menopause once you’ve gone 12 consecutive months without a period.

What are the first signs of perimenopause?

The first signs of perimenopause are often changes in your period, such as cycles becoming longer or shorter, heavier or lighter, or occasionally skipped. Early symptoms can also include worsening PMS, new sleep problems, hot flashes or night sweats, mood swings, and vaginal dryness, even while you’re still having frequent periods.

What are the symptoms of perimenopause?

Perimenopause symptoms vary but commonly include irregular periods, hot flashes, night sweats, sleep disturbances, and mood changes such as irritability, anxiety, or low mood. Many people also notice brain fog, vaginal dryness, changes in sex drive, weight gain or body-shape changes, and new or worsening migraines or joint aches.

What are the “34 symptoms of perimenopause”?

The “34 symptoms of perimenopause” is a popular list that groups many possible changes. The list usually includes hot flashes, night sweats, irregular periods, mood changes, anxiety, brain fog, sleep problems, vaginal dryness, low libido, weight gain, and other symptoms. Not everyone experiences all 34 symptoms. Your symptom mix will be individual.

Can you get pregnant during perimenopause?

Yes, you can still get pregnant during perimenopause. Although ovulation becomes less predictable, it doesn’t stop entirely right away. As long as you’re still having periods – even irregularly – there’s a chance of releasing an egg. If you don’t want to become pregnant, you still need reliable contraception until you’ve gone 12 months without a period.

Are there tips on how to lose weight during perimenopause?

To lose weight during perimenopause, focus on realistic, sustainable habits. Prioritize strength training to maintain muscle and metabolism, build meals around protein, fiber, and healthy fats, and reduce sugary drinks, ultra-processed foods, and excess alcohol. Improving sleep and stress management also helps to regulate appetite and energy, making weight loss easier to achieve.

The takeaway

Perimenopause is a natural transition, but that doesn’t mean you have to “just live with it.” Understanding what’s happening with your hormones, cycles, and symptoms is the first step toward getting real support. If you found this helpful, explore our related articles on menopause, mindset, brain fog, and symptom relief strategies.


Source: Thorne Take 5 Daily

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