Perimenopause and Menopause: The Complete Guide

Perimenopause and menopause are two parts of one natural change. Perimenopause is the run-up, when periods become irregular and symptoms can start. Menopause is reached after a full year with no period, and the National Institute on Aging says the average age of menopause in the United States is 52.

This guide covers how long each stage lasts, common symptoms, bone and heart changes, treatment options to discuss with your doctor, and everyday steps with evidence behind them.

What are perimenopause and menopause?

Perimenopause is the transition before your periods stop for good. Menopause is a single point in time: 12 months in a row without a period. The years after that point are called postmenopause.

According to the National Institute on Aging (NIA), most women begin the menopausal transition between ages 45 and 55. During this time, the ovaries make much less estrogen and progesterone, and these changes may explain many of the symptoms.

“Menopause is a normal life stage, but its symptoms can significantly reduce quality of life.” (U.S. Food and Drug Administration)

Menopause can also happen after surgery to remove both ovaries. In that case, periods stop and symptoms can begin right away.

How long does perimenopause last?

Perimenopause usually lasts several years, and the earlier it starts, the longer it tends to last. The NIA says symptoms related to menopause can last between two and eight years, though timing varies a lot between women.

The best data come from the Study of Women’s Health Across the Nation (SWAN), which has followed US women from several ethnic groups through midlife. In a SWAN analysis of 1,145 women, the median length of the transition ranged from 4.37 years in women who started latest to 8.57 years in women who started earliest. Smoking was linked to an earlier start and a shorter transition. African American women had a longer transition than white women.

Because you only know you have reached menopause looking back, the NIA advises women who do not want to get pregnant to keep using birth control for at least a full 12 months after the last period.

What are the most common symptoms?

Changes in your period are often the first sign, followed by hot flashes, night sweats, poor sleep and mood changes. Not every woman gets every symptom, and many have mild ones.

Hot flashes are the best known. The FDA says they occur in around 80% of menopausal women. For many, they are bothersome rather than mild: an international survey cited by the FDA found moderate to severe hot flashes in about 34% of US women aged 45 to 65. Most hot flashes last between 30 seconds and 10 minutes, according to the NIA.

Other common changes listed by the NIA include vaginal dryness, bladder leaks and more urinary tract infections, trouble sleeping, irritability, a larger waist, stiff joints, and trouble focusing. Some of these come from aging rather than menopause itself.

Which section covers my symptom?

Use this table to find the part of the guide that fits what you notice. It is not a diagnosis.

What you notice	What it can look like	Read this section
Irregular periods	Shorter or longer cycles, heavier or lighter bleeding	How long perimenopause lasts; when to see a doctor
Hot flashes and night sweats	Sudden heat in the face and upper body, sweating, chills	How long hot flashes last; hormone and non-hormonal options
Poor sleep or low mood	Waking at night, irritability, feeling down	Mood and sleep
Vaginal dryness or painful sex	Dryness, discomfort, more urinary infections	Hormone therapy; when to see a doctor
Bone and heart changes	No symptoms at first; shows up in scans and blood tests	Bones and heart; lifestyle and nutrition
Bleeding after a year with no period	Any spotting or bleeding	When to see a doctor

How long do hot flashes last?

For many women, frequent hot flashes last more than 7 years. In a SWAN analysis of 1,449 women with frequent hot flashes or night sweats, the median total length was 7.4 years. They continued for a median of 4.5 years after the final period.

Timing mattered. Women whose hot flashes began before or early in perimenopause had the longest run, a median of more than 11.8 years. Women whose hot flashes began only after menopause had the shortest, a median of 3.4 years. African American women reported the longest total length, a median of 10.1 years.

The authors advise doctors to tell women that frequent hot flashes “could last more than 7 years.”

Does menopause affect mood and sleep?

Yes, the risk of depression rises around menopause, and sleep problems are more common. In a SWAN study of 221 women followed each year, women were two to four times more likely to have an episode of major depression during perimenopause or early postmenopause than before. A past history of depression was a strong predictor.

Sleep can suffer too. A 2026 narrative review found sleep problems are more common in perimenopause and postmenopause than before the transition, though rates vary with hot flashes and how sleep is measured. Night sweats and needing to pass urine can both wake you, according to the NIA.

If low mood is affecting daily life, talk to your doctor or a mental health professional. The NIA notes there are treatments available to help.

What happens to your bones and heart?

Bone loss speeds up around the final period, and cholesterol rises at the same time. The NIA notes that after menopause, women are more vulnerable to heart disease, stroke and osteoporosis.

Bones. A SWAN study of 862 women tracked bone density from 5 years before to 5 years after the final period. Over those 10 years, women lost 10.6% of spine bone density, and 7.38% was lost in just 3 years: from 1 year before to 2 years after the last period.

Heart. Cardiovascular disease is the leading cause of death in women, notes an American Heart Association scientific statement. In a SWAN study of 1,054 women, total cholesterol and LDL cholesterol rose substantially within a year either side of the final period, a change linked to menopause rather than age alone. The authors advise checking cholesterol during perimenopause.

What should you know about hormone therapy now?

The NIA calls hormone therapy very effective for hot flashes in women who are able to use it, and its FDA warnings changed in 2025 and 2026. It is a prescription decision, so talk to your doctor about your own history.

On November 10, 2025, the FDA asked makers to remove statements about heart disease, breast cancer and probable dementia from the boxed warning, its most prominent safety warning. On February 12, 2026, it approved the first changes for 6 products, and 29 companies had submitted changes.

Some warnings stay. The boxed warning for endometrial cancer remains on systemic estrogen-alone products, and the heart and breast cancer risks stay in the warnings section of the label. New labels add the option of starting systemic therapy in women under 60 or within 10 years of menopause.

The FDA says only about 2 million women aged 46 to 65 received a prescription in 2020, while about 41 million US women were aged 45 to 64.

What non-hormonal treatments has the FDA approved?

The FDA has approved three non-hormonal medicines for women who cannot or choose not to use hormones, according to its 2026 consumer update. All three need a prescription.

• Low-dose paroxetine. An antidepressant approved for hot flashes, taken at a lower dose than for depression, as the NIA explains.
• Fezolinetant. Approved in May 2023 for moderate to severe hot flashes. It acts on the part of the brain that controls body temperature. The FDA later added a warning about rare but serious liver injury, so blood tests are part of using it.
• Elinzanetant. Approved on October 24, 2025 for moderate to severe hot flashes due to menopause.

Which lifestyle and nutrition steps help?

Simple changes can ease mild hot flashes, and good nutrition supports bones and heart. The NIA suggests dressing in layers, keeping a fan nearby, a cooler bedroom, limiting alcohol, spicy food and caffeine, and quitting smoking.

Staying active is part of the NIA’s advice after menopause, but exercise is not proven to ease hot flashes. A Cochrane review of 5 trials with 733 women found the evidence too weak to say either way.

For bones, the 2020 to 2025 Dietary Guidelines raise women’s calcium goal from 1,000 mg to 1,200 mg a day at age 51, with 600 IU of vitamin D. Fiber matters as well: the goal is 22 grams a day from 51, and our guide to fiber for women shows how to reach it. For digestion changes, see our gut health guide.

The NIA warns that black cohosh, DHEA and soy isoflavones are not proven, and some carry risks such as liver damage. Check with your doctor before taking any herb or supplement.

When should you see a doctor?

See a doctor if your bleeding changes in certain ways, if symptoms disrupt your life, or if your periods stop early. The NIA lists these bleeding changes to check:

• Periods that come very close together, or heavy bleeding.
• Bleeding or spotting after sex or between periods.
• Periods that last more than a week.
• Any bleeding or spotting after more than a year without a period.

It is also worth booking a visit if hot flashes, poor sleep or low mood are wearing you down. Your doctor will usually ask about your age, symptoms and family history, and may suggest a blood test in some cases, such as periods stopping at an early age. You can browse more of our menopause coverage, and read how we check the research on our About page.

Frequently asked questions

What is the average age of menopause?

The average age of menopause in the United States is 52, according to the National Institute on Aging. Most women begin the transition between ages 45 and 55.

Can you get pregnant during perimenopause?

Yes, it is still possible. The National Institute on Aging advises women who do not want to get pregnant to keep using birth control for at least a full 12 months after their last period.

Do hot flashes stop after menopause?

Not always right away. In a large US study, frequent hot flashes continued for a median of 4.5 years after the final period, and lasted a median of 7.4 years in total.

Did the FDA remove the warning on hormone therapy?

Partly. In November 2025 the FDA asked makers to remove heart disease, breast cancer and probable dementia statements from the boxed warning. The endometrial cancer boxed warning stays on systemic estrogen-alone products, and other risks remain on the label.

Written by the Health Science Mag Editorial Team.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

This article is for education and is not medical advice. Talk to your doctor before changing your diet, supplements, or medication.