Perimenopause Symptoms: Early Signs, What's Normal and When to Get Help

What is happening in your body during perimenopause?

Perimenopause is the run-up to menopause, the years when your ovaries' output becomes less predictable before it winds down for good. Menopause itself is a single date: the day you reach 12 months in a row without a period. Everything before that date that involves hormonal change is perimenopause; everything after it is postmenopause.

The defining feature of perimenopause is not simply "low estrogen." It is fluctuation. As the number of remaining egg follicles falls, the signals between your brain and ovaries become erratic. Some cycles produce surges of estradiol higher than anything you had in your 30s; others barely produce any. Ovulation happens less often, so progesterone, which is made after ovulation, tends to drop earlier and more consistently. A review of hormone changes across the transition describes exactly this pattern of variable estradiol, rising follicle-stimulating hormone (FSH) and falling progesterone (Su and Freeman, 2009).

Estrogen and progesterone act on receptors in the brain, blood vessels, skin, bones, bladder and vaginal tissue. That is why the symptoms can seem so scattered and unrelated, and why they often get blamed on stress, aging or a busy life.

Researchers divide the transition into stages using the STRAW+10 system (Harlow et al., 2012):

• Early perimenopause: your cycle length starts varying by seven days or more from one cycle to the next.
• Late perimenopause: you have gaps of 60 days or more between periods. Hot flashes are most likely to show up in this stage.

For a side-by-side explanation of the stages, see perimenopause vs. menopause: the key differences.

When does perimenopause start, and how long does it last?

Most women notice the first changes in their mid-to-late 40s, but starting at 40 or even in the late 30s is within the normal range. According to the National Institute on Aging, most women begin the menopausal transition between ages 45 and 55, it may last several years, and symptoms commonly last between two and eight years. The average age of the final period in the U.S. is about 51 to 52 (ACOG).

By the numbers

Perimenopause timing

45–55the ages when most women begin the menopausal transitionSource: NIA

2–8 yrshow long symptoms commonly lastSource: NIA

51–52average age of the final period in the U.S.Source: ACOG

Smoking, some cancer treatments, surgery that removes the ovaries and family history can all bring the transition earlier. Periods that stop before age 40 are not considered typical perimenopause; that can be premature ovarian insufficiency, which affects about 1 in 100 women under 40 and needs its own evaluation (NICHD). Our menopause timeline guide walks through each stage in more detail.

What are the early signs of perimenopause?

No two women have the same mix, and you do not need to have every symptom for perimenopause to be the explanation. These are the changes most commonly reported, roughly in the order many women notice them.

1. Changes in your period

This is often the first clue. Cycles may shorten (say, every 23 days instead of 28), then later stretch out or skip. Flow can become heavier, lighter or simply unpredictable from month to month. High-estrogen cycles can build a thicker uterine lining, which is one reason heavy periods are common in early perimenopause.

2. Sleep that gets worse

Trouble falling asleep, waking at 3 a.m. and not drifting back off, or waking drenched in sweat. In the multi-ethnic SWAN study, reported sleep difficulty rose as women moved through the transition (Kravitz et al., 2008). Falling progesterone, night sweats and anxiety can all play a part. More on this in perimenopause insomnia remedies.

3. Hot flashes and night sweats

A sudden wave of heat over the chest, neck and face, sometimes with flushing, sweating, a racing heart and chills afterward. Night sweats are the same event during sleep. In SWAN, hot flashes and night sweats lasted a median of 7.4 years in total, and longer for women whose symptoms began early in the transition (Avis et al., 2015). See our full guide to hot flashes.

4. Mood changes, anxiety and irritability

Many women describe feeling unlike themselves: a shorter fuse, tearfulness, new anxiety or worse premenstrual symptoms. This is more than stress. In the Harvard Study of Moods and Cycles, women with no history of depression were about twice as likely to develop significant depressive symptoms once they entered the transition (Cohen et al., 2006). Read more about perimenopause mood swings, and about menopause and depression if your low mood is persistent.

5. Brain fog

Losing words mid-sentence, forgetting why you walked into a room, rereading the same email. In SWAN, women in perimenopause did not show the usual improvement on repeated memory and processing-speed tests, and performance recovered after menopause (Greendale et al., 2009). For most women this is a temporary dip, not a sign of dementia. Our menopause brain fog guide covers what helps.

6. Vaginal dryness, urinary changes and lower libido

Less natural lubrication, discomfort with sex, more urinary urgency or more frequent urinary tract infections. These tend to start later than hot flashes and, unlike hot flashes, usually keep progressing without treatment. Lower desire is common too, often tangled up with poor sleep and mood.

7. Body changes

Weight shifting toward the waist, joint aches and stiffness, drier skin, thinning hair, breast tenderness, new or worsening headaches and heart palpitations are all reported during perimenopause. Bone loss also speeds up in the years around the final period, usually without any symptoms at all.

Perimenopause symptoms checklist: early vs. later perimenopause

Symptoms tend to shift as the transition progresses. Use this as a rough guide, not a rulebook; some women have their hardest stretch early on.

What's normal, and what's a reason to get checked?

Perimenopause explains a lot, but it should not be assumed to explain everything. These signs deserve prompt medical attention rather than waiting it out:

• Soaking through a pad or tampon every hour for several hours, or bleeding that lasts more than seven days
• Bleeding between periods or after sex
• Any bleeding after you have gone 12 months without a period
• Palpitations with chest pain, shortness of breath, dizziness or fainting
• Low mood lasting more than two weeks, or any thoughts of harming yourself (in the U.S., call or text 988)
• Periods stopping before age 40

Several common conditions mimic perimenopause or happen alongside it, so a good evaluation looks for them too:

• Thyroid disease: fatigue, weight change, mood shifts, palpitations and cycle changes. See thyroid and menopause.
• Iron-deficiency anemia: often caused by heavy perimenopausal periods, and a cause of fatigue and brain fog in its own right.
• Depression or anxiety disorders: these can be triggered by the transition but need their own treatment.
• Fibroids or polyps: can cause heavy or irregular bleeding.
• Pregnancy: still possible until menopause, so a skipped period can mean either.

How is perimenopause diagnosed?

It helps to bring a few months of cycle dates, a simple symptom log (sleep, mood, hot flashes) and a list of what you have already tried. Our guide on how to talk to your doctor about menopause has a checklist of questions.

What helps perimenopause symptoms?

The right approach depends on which symptoms bother you most, your health history and your preferences. Many women combine several.

Lifestyle changes with real benefits

• Strength training two or more days a week helps protect muscle and bone during a period of accelerated loss.
• Protein at each meal supports muscle maintenance as body composition shifts.
• Limiting alcohol, especially in the evening, which commonly worsens night sweats and fragments sleep.
• A cool bedroom and layered bedding to make night sweats less disruptive.
• Not smoking, which is linked to earlier menopause and more hot flashes.

The Menopause Society's review of nonhormone options found good evidence that cognitive behavioral therapy and clinical hypnosis help with bothersome hot flashes, but not enough evidence to recommend most supplements, including black cohosh (2023 nonhormone therapy position statement). For a fuller look at drug-free options, see managing menopause naturally.

Nonhormonal prescriptions

For women who cannot or prefer not to use hormones, FDA-approved options for hot flashes include low-dose paroxetine and fezolinetant (Veozah). Some antidepressants, gabapentin and oxybutynin are also used off-label. If mood symptoms are prominent, antidepressants and therapy are proven treatments in their own right.

Hormone therapy

Hormone therapy is the most effective treatment for hot flashes and night sweats, and it also prevents bone loss. The Menopause Society's position is that for healthy women under 60 or within 10 years of menopause, the benefits generally outweigh the risks when it is used for bothersome symptoms (2022 hormone therapy position statement). Women who still have a uterus need progesterone (or a progestin) along with estrogen to protect the uterine lining. It is not right for everyone: a history of breast cancer, blood clots, stroke, heart disease or unexplained bleeding can rule it out or require specialist input.

FDA-approved estradiol patches, gels and pills, used with FDA-approved progesterone, are widely available through primary care doctors and gynecologists. Some telehealth services, including Amie, also offer compounded options. Amie HRT+ is a single cream containing estradiol and progesterone, with the strength chosen by a licensed clinician after reviewing your health history; it is compounded and not FDA-approved. A clinician decides whether any hormone therapy is appropriate for you. Our hormone replacement therapy guide compares the options.

Local treatment for vaginal symptoms

If dryness, painful sex or urinary symptoms are the main issue, low-dose vaginal estrogen, moisturizers and lubricants work locally with very little absorbed into the bloodstream. See genitourinary syndrome of menopause.

The bottom line