Perimenopause — the transition years before your final period — can start earlier and feel stranger than most women expect. Symptoms are often dismissed as stress, low mood or “just getting older”, and many women see several clinicians before anyone joins the dots. This guide from The Vesey Private Hospital in Sutton Coldfield explains the symptoms to look for, what’s normal, which blood tests help (and when they don’t), and the treatment options that actually work. Our women’s health GPs offer same-week appointments, 7 days a week — no referral needed.
What Is Perimenopause and When Does It Start?
Perimenopause is the phase when your ovaries gradually produce less oestrogen and progesterone, and hormone levels begin to swing unpredictably. It typically starts in your mid-40s, but for many women changes begin in their late 30s or early 40s. It usually lasts 4–8 years and ends 12 months after your final period — the point defined as menopause. The average age of menopause in the UK is 51.
Because hormone levels fluctuate rather than simply fall, symptoms can come and go for years. You can still ovulate and become pregnant during perimenopause, and your periods may remain fairly regular even while symptoms are significant — which is one reason the diagnosis is so often missed.
The Most Common Perimenopause Symptoms
Most women experience a combination of the following. You do not need to have hot flushes for it to be perimenopause:
Cycle changes — periods becoming shorter, longer, heavier, lighter or less predictable are usually the first sign. Vasomotor symptoms — hot flushes and night sweats affect around 8 in 10 women at some stage. Sleep disruption — waking at 3–4am, often drenched or with a racing mind, even without obvious sweats. Mood changes — new or worsening anxiety, irritability, low mood, rage or tearfulness; perimenopause is a common trigger for first-time anxiety in the 40s. Brain fog — poor concentration, losing words mid-sentence, walking into rooms and forgetting why. Physical symptoms — joint and muscle aches, palpitations, headaches or migraines, bloating, breast tenderness, itchy or dry skin, vaginal dryness, reduced libido, urinary urgency and recurrent UTIs. Weight change — fat redistributing to the middle even when diet and exercise haven’t changed.
Individually each symptom has many possible causes. It’s the pattern — several of these appearing together in your 40s, often alongside cycle changes — that points to perimenopause.
Do Blood Tests Diagnose Perimenopause?
Usually not on their own — and any clinic that promises a single “perimenopause test” is overselling. NICE guidance is clear that in women over 45 with typical symptoms, perimenopause is a clinical diagnosis: FSH and oestrogen levels swing so much day to day that a single normal result can’t rule it out.
Blood tests still earn their place in three situations. First, if you’re under 45, FSH testing helps investigate possible early menopause or premature ovarian insufficiency, which needs prompt treatment to protect bones and heart. Second, to rule out look-alikes: an underactive thyroid, iron deficiency and low B12 or vitamin D can each mimic perimenopausal fatigue, brain fog and low mood. Third, as a baseline before starting treatment — cholesterol, HbA1c and other markers matter because cardiovascular risk rises after oestrogen falls.
At The Vesey we offer a female hormone profile alongside thyroid, ferritin, B12, vitamin D and metabolic markers as a single blood draw, with results in 24–48 hours and a GP consultation to interpret them properly — individual tests start from £32.
Treatment Options That Actually Work
HRT (hormone replacement therapy) is the most effective treatment for hot flushes, night sweats, mood symptoms and vaginal dryness, and modern body-identical HRT (transdermal oestrogen with micronised progesterone) has a much better safety profile than older formulations. For most women under 60 who start within 10 years of menopause, the benefits outweigh the risks — but the decision should always be personalised to your history.
Non-hormonal options help too: CBT has good evidence for hot flushes and sleep; regular strength training protects bone and muscle; cutting alcohol and caffeine reduces flushes and 3am waking; and specific medications can help those who can’t take HRT. Testosterone may be considered for low libido that persists on HRT.
The wrong approach is to soldier on for years. Untreated perimenopausal symptoms are strongly linked to relationship strain, career damage and depression — and oestrogen deficiency has long-term effects on bone density and cardiovascular health.
When to See a Doctor
Book an appointment if symptoms are affecting your quality of life, sleep, work or relationships; if your periods have become very heavy, closer than every 3 weeks, or you bleed between periods or after sex (these need checking in their own right); or if you’re under 45 with possible menopausal symptoms.
A good perimenopause consultation takes time. At The Vesey, women’s health GP appointments are 30 minutes as standard — long enough to take a full history, agree which tests genuinely add value, and leave with a treatment plan rather than a leaflet. Appointments cost from £90, with same-week availability, 7 days a week. Call 0121 387 3727 or book online.
Struggling with perimenopause symptoms? Get answers this week
CQC-regulated · Rated 4.87/5 on Doctify · Open 7 days 8am–8pm · No referral needed
Frequently Asked Questions
At what age does perimenopause start?
Most women notice changes between 40 and 44, though it can start in the late 30s. The transition typically lasts 4–8 years before periods stop completely. Symptoms starting before 40 should always be reviewed by a doctor to rule out premature ovarian insufficiency.
Can I have perimenopause symptoms with regular periods?
Yes. Hormone fluctuations often cause anxiety, poor sleep, brain fog and joint aches while cycles are still fairly regular. Cycle changes usually appear at some point, but they are not required for a diagnosis in women over 45 with typical symptoms.
What blood tests should I have for perimenopause?
Over 45, diagnosis is clinical and hormone tests are often unnecessary. Under 45, FSH is useful. For any age it is worth excluding thyroid disease, iron deficiency (ferritin), low B12 and vitamin D, which mimic perimenopausal symptoms. The Vesey offers all of these as a single blood draw with GP review, from £32 per test.
Do I need a referral to discuss HRT at The Vesey?
No referral is needed. You can book a 30-minute women's health GP appointment directly (from £90), 7 days a week. Your GP will take a full history, arrange any baseline tests and can prescribe body-identical HRT the same day where appropriate.