Blood Tests for Menopause: What You Actually Need
Over 45 with hot flushes and irregular periods? You probably don't need a blood test — it's clinical menopause. But blood tests matter for early menopause, HRT monitoring, and screening for conditions that menopause accelerates.
When Do You Need a Blood Test for Menopause?
One of the most common misconceptions is that a blood test is required to diagnose menopause. In most cases, it is not. If you are over 45 with typical symptoms (hot flushes, night sweats, irregular or stopped periods, vaginal dryness), the Australian Menopause Society says the diagnosis is clinical — no blood test needed. Your GP can start treatment based on symptoms alone.
Blood tests ARE valuable in specific situations:
You are under 45 and periods have stopped or become irregular
You are under 40 (possible premature ovarian insufficiency — needs urgent investigation)
You have had a hysterectomy (no periods to guide diagnosis)
You are on hormonal contraception (which masks cycle changes)
Your symptoms are atypical (to exclude thyroid, anaemia, or other conditions)
Your GP needs confirmation before starting or stopping HRT
Hormone Levels Through the Menopause Transition
Normal menstrual cycles, ovulation occurring regularly.
FSH: 3–10 IU/L (follicular phase)
Oestradiol: 100–400 pmol/L (varies with cycle)
Symptoms: None — normal reproductive function.
Blood test value: Baseline reference only.
Cycles still regular but subtle hormonal shifts begin. May start 2–8 years before final period.
FSH: 10–25 IU/L (may fluctuate widely)
Oestradiol: Fluctuating — can spike higher than reproductive years
Symptoms: Hot flushes beginning, sleep disruption, mood changes, cycle length changes.
Blood test value: Limited — FSH fluctuates wildly. Clinical symptoms are more reliable.
Periods becoming irregular or skipped. Gap of 60+ days between periods.
FSH: 25–40 IU/L (still fluctuating)
Oestradiol: Declining but erratic — can still spike
Symptoms: Worsening vasomotor symptoms, vaginal dryness, joint pain, brain fog.
Blood test value: Moderately useful — consistently elevated FSH supports diagnosis.
12+ months since last period. Diagnosis is retrospective.
FSH: Above 30 IU/L (consistently)
Oestradiol: Below 100 pmol/L (consistently low)
Symptoms: Hot flushes may continue for years, increased cardiovascular and osteoporosis risk.
Blood test value: Confirmatory — consistently high FSH + low oestradiol.
5 Blood Test Groups for Menopause
FSH and Oestradiol
What these tests measure: FSH rises as the ovaries produce less oestrogen — the pituitary gland increases FSH in an attempt to stimulate the failing ovaries. A single FSH above 30 IU/L with oestradiol below 100 pmol/L is suggestive of menopause, but in perimenopause these levels fluctuate dramatically from day to day and month to month. A woman can have a menopausal FSH one week and a normal FSH the next.
When useful: FSH testing is most useful in women under 45 with suspected premature ovarian insufficiency (POI), women who have had a hysterectomy (no periods to guide diagnosis), women on progestogen-only contraception (which suppresses periods), and for confirming post-menopausal status before starting or stopping HRT.
Australian context: The Australasian Menopause Society (AMS) states that in women over 45 with typical symptoms (hot flushes, night sweats, irregular periods), blood tests are generally NOT needed — the diagnosis is clinical. Blood tests add most value in atypical presentations, early menopause (under 45), premature ovarian insufficiency (under 40), and when another diagnosis needs to be excluded.
Thyroid Function
What these tests measure: Thyroid disorders are common in women of menopausal age and produce symptoms that overlap significantly with menopause — fatigue, weight gain, mood changes, heat or cold intolerance, and irregular periods. Hypothyroidism affects approximately 5–10% of Australian women over 50. A normal TSH effectively excludes thyroid disease as the cause of symptoms.
When useful: Always check TSH when evaluating menopausal symptoms, particularly if there is significant fatigue, unexpected weight change, constipation, dry skin, or a family history of thyroid disease. An isolated elevated TSH (above 4.0 mIU/L) with normal free T4 is subclinical hypothyroidism — common in this age group and may warrant monitoring or treatment.
Australian context: The RCPA and AMS both recommend TSH as part of the initial assessment of menopausal symptoms. TSH is bulk billed under Medicare. Free T4 and T3 are only indicated if TSH is abnormal. Thyroid antibodies (anti-TPO) are useful if Hashimoto’s thyroiditis is suspected.
Bone Health Assessment
What these tests measure: Oestrogen protects bone density — after menopause, women lose bone at an accelerated rate (2–3% per year in the first 5–7 years). Blood tests cannot directly measure bone density (that requires a DEXA scan), but they can identify correctable contributors to bone loss: vitamin D deficiency, calcium deficiency, and hyperparathyroidism.
When useful: All post-menopausal women should have vitamin D and calcium levels checked. Vitamin D below 50 nmol/L is deficient. ALP elevation can indicate increased bone turnover. PTH should be checked if calcium is elevated (primary hyperparathyroidism is common in post-menopausal women and causes accelerated bone loss).
Australian context: Approximately 1 in 3 Australian women over 60 will experience an osteoporotic fracture. Medicare provides a bulk-billed DEXA scan for women over 70, or earlier with specific risk factors (premature menopause, prolonged corticosteroid use, low-trauma fracture). Vitamin D testing is bulk billed when clinically indicated. The AMS recommends 600–800 IU daily vitamin D supplementation for most post-menopausal women.
Cardiovascular Risk Screening
What these tests measure: Cardiovascular disease is the leading cause of death in Australian women — not breast cancer. Before menopause, oestrogen provides cardiovascular protection by maintaining healthy HDL cholesterol levels and blood vessel flexibility. After menopause, LDL cholesterol rises, HDL may fall, and cardiovascular risk increases significantly. Most women are unaware of this shift.
When useful: All women should have a cardiovascular risk assessment around the time of menopause (age 45–55). This includes a lipid profile, fasting glucose or HbA1c, blood pressure, and assessment of family history. The absolute cardiovascular risk score (available via the Australian CVD Risk Calculator) guides treatment decisions.
Australian context: The Heart Foundation and AMS recommend cardiovascular risk assessment for all women entering menopause. Lipid profiles and fasting glucose are bulk billed under Medicare. Interestingly, HRT started within 10 years of menopause (the "timing hypothesis") may provide cardiovascular benefit — this is an evolving area of research and should be discussed with your GP.
HRT Monitoring Tests
What these tests measure: Women on hormone replacement therapy (HRT) require periodic monitoring. Oestradiol levels can guide transdermal (patch/gel) dosing — the target is typically 200–600 pmol/L for symptom relief. FSH can confirm the HRT dose is sufficient (FSH should suppress below 30 IU/L). Liver function should be checked within 3 months of starting oral HRT (not needed for transdermal). Lipid profiles should be monitored as HRT affects lipid metabolism.
When useful: Routine blood tests are not needed for all women on HRT, but are recommended when symptoms persist despite adequate doses, when changing formulations, when on transdermal therapy (to confirm absorption), and annually as part of an HRT review. The 2–3 month post-initiation check is important to ensure the chosen preparation and dose are working.
Australian context: The AMS recommends an annual HRT review including symptom assessment, blood pressure, and discussion of risks/benefits. Blood tests are not mandatory at every review but are useful when adjusting doses. Mammographic screening (BreastScreen Australia, free for women 40–74) should continue as recommended while on HRT.
What to Ask Your GP
Script for your GP appointment:
“I've been experiencing hot flushes / night sweats / irregular periods / mood changes / sleep problems. I'd like to discuss whether I'm entering menopause and whether blood tests would help. Could we also check my thyroid, vitamin D, lipids, and fasting glucose to screen for related conditions?”
| Test | Purpose | Cost (Australia) |
|---|---|---|
| FSH | Confirm menopausal status (most useful under 45 or atypical) | Bulk billed |
| Oestradiol (E2) | Assess ovarian function, guide HRT dosing | Bulk billed |
| TSH | Exclude thyroid disease (symptom overlap) | Bulk billed |
| Lipid Profile | Cardiovascular risk screening | Bulk billed |
| Fasting Glucose / HbA1c | Diabetes screening (risk increases post-menopause) | Bulk billed |
| Vitamin D | Bone health assessment | Bulk billed |
| Calcium + PTH | Exclude hyperparathyroidism if calcium elevated | Bulk billed |
| Liver Function Tests | Baseline before oral HRT, periodic monitoring | Bulk billed |
| DEXA Scan (bone density) | Osteoporosis screening — imaging, not blood test | Bulk billed* |
* DEXA scan is bulk billed for women over 70, or earlier with specific risk factors (premature menopause before 45, low-trauma fracture, prolonged corticosteroid use >3 months, conditions causing bone loss).
Related Reading
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Reference ranges sourced from the Royal College of Pathologists of Australasia (RCPA) and the Australasian Menopause Society (AMS). SmarterBlood provides health information and AI-powered blood test analysis. It is not a substitute for professional medical advice, diagnosis, or treatment.