What perimenopause is
Perimenopause is the time, often four to eight years, when your ovaries wind down before your last period. Hormone levels swing rather than simply fall, which is why symptoms come and go. It usually starts in the mid 40s but can begin in the late 30s.
Common signs: periods that change in timing or heaviness, hot flashes and night sweats, poor sleep, new anxiety or low mood, brain fog, joint aches, and vaginal dryness. You can have all of these while still getting periods, and your hormone blood tests can look normal. That is why a single blood test cannot diagnose it.
Things that look like perimenopause
A good doctor rules these out before blaming hormones:
- Thyroid disease. Fatigue, weight change, and mood symptoms overlap. One blood test, TSH, settles it.
- Depression or anxiety. These can start on their own in midlife and respond to their own treatment.
- Iron deficiency from heavy periods. Simple to check and treat.
- Sleep apnea. More common after 40, and it causes fatigue and brain fog.
This is one reason to start with a doctor who knows your history rather than a clinic that only sells one thing.
Which doctor to see
Start with your OB-GYN or primary care doctor. Both can diagnose perimenopause, rule out the look-alikes, and prescribe treatment, including hormone therapy and low-dose birth control pills, which are often the first choice while you still have periods.
See a menopause specialist, ideally one certified by The Menopause Society (MSCP or NCMP), when your doctor is unsure, when a first treatment has not helped after three months, when bleeding is very heavy or irregular in a way that needs a workup, or when you have a history of breast cancer, blood clots, or migraine with aura that makes the choice harder.
See an endocrinologist only if there is a question about your thyroid, adrenal glands, or early menopause before 40.
When it is time to go
Do not wait it out if:
- Symptoms affect your sleep, work, or relationships
- Bleeding soaks through a pad or tampon every hour, lasts more than seven days, or comes less than three weeks apart
- You have any bleeding after a year without periods
- You are under 40 and your periods have stopped or become very irregular
The last two always need a visit, because they can point to something other than perimenopause.
What a good plan looks like
There is no reason to suffer through perimenopause. The guidelines support several options:
- Hormone therapy or a low-dose birth control pill for hot flashes, night sweats, sleep, and irregular bleeding. For healthy women in their 40s the benefits usually outweigh the risks.
- Non-hormone medicines for hot flashes if you cannot take hormones, including fezolinetant and certain antidepressants at low doses.
- Vaginal estrogen for dryness and painful sex. It works locally and is safe for almost everyone.
- Cognitive behavioral therapy for sleep and hot flash distress, which has good evidence.
What the guidelines do not support: compounded "bioidentical" creams dosed by saliva tests, hormone pellets, and supplement stacks sold for "hormone balance."
Finding one who follows the guidelines
Every clinician in our menopause specialists list has had their license checked against the national registry and has attested to following the current guidelines. We do not use patient reviews or star ratings. A clinician who sells supplements, compounded hormones, pellets, or peptides is not listed.
Common questions
Can a blood test tell me if I am in perimenopause?
Usually not. Hormone levels swing day to day during perimenopause, so a normal result does not rule it out. Doctors diagnose it from your age, your period pattern, and your symptoms. A TSH test to rule out thyroid disease is reasonable.
Is it safe to take hormones while I still have periods?
For most healthy women in their 40s, yes. Doctors often use a low-dose birth control pill or menopause hormone therapy during perimenopause. Your doctor will check for blood clot and breast cancer risks first.
How long does perimenopause last?
Four to eight years is typical. Menopause itself is one day, the point twelve months after your last period. Symptoms can continue for several years after that.
References
- The 2022 Hormone Therapy Position Statement (The Menopause Society, 2022)
- The 2023 Nonhormone Therapy Position Statement (The Menopause Society, 2023)
- Find a Menopause Society Certified Practitioner (The Menopause Society)
- Management of Menopausal Symptoms (Practice Bulletin 141) (American College of Obstetricians and Gynecologists, 2014, reaffirmed)
- Compounded Bioidentical Menopausal Hormone Therapy (Committee Opinion 532) (American College of Obstetricians and Gynecologists, 2012, reaffirmed)
- Menopause Hormone Therapy: Important Safety Information (U.S. Food and Drug Administration)
