AMH Fertility Test

🧬 What AMH actually measures

AMH (anti-Müllerian hormone) is produced by cells surrounding the small, developing follicles in your ovaries. The level in your blood roughly correlates with how many of these small follicles you have — which is used as an estimate of ovarian reserve (the remaining egg supply).

• Levels naturally decline with age, more rapidly from the mid-30s
• Doesn't fluctuate much during your cycle — can be tested any day
• Measures egg quantity, not egg quality

⚠️ What it can't tell you — the important part

• RANZCOG's own clinical guideline states plainly: AMH is not predictive of live birth
• A major 2020 review by the American Society for Reproductive Medicine found ovarian reserve markers are poor predictors of reproductive potential, independent of age
• Research presented in 2026 found no meaningful difference in AMH levels between women with unexplained infertility and the general population — and the likelihood of spontaneous (natural) conception did not differ between women with high or low AMH, even in older women

In plain terms: a "low" AMH result in an otherwise healthy woman with regular cycles does not mean you can't get pregnant naturally, and a "good" AMH result doesn't guarantee you will. Age remains the strongest predictor of natural fertility — not a single hormone level.

✅ What it's genuinely useful for

AMH has real, well-supported clinical uses — just not as a general "fertility crystal ball":

• Planning IVF stimulation — predicts how many eggs you're likely to produce with fertility medication, which helps your specialist plan your treatment and dose
• Diagnosing PCOS — an elevated AMH is now accepted (2023 international guideline) as an alternative to an ultrasound for confirming polycystic ovarian morphology
• Premature ovarian insufficiency — investigating unusually early loss of ovarian function
• Before chemotherapy or radiotherapy — baseline reading to help plan fertility preservation (egg freezing) before treatment that may affect your ovaries
• Confirming menopause and monitoring rare granulosa cell ovarian tumours

💰 Cost and Medicare rebate

AMH isn't its own dedicated Medicare item — whether it's rebated depends on why your doctor is ordering it:

• Medicare-rebate eligible: PCOS investigation, premature ovarian insufficiency, pre-chemo/radiotherapy fertility preservation planning, pre-IVF under a fertility specialist's management, investigating a suspected ovarian tumour
• Not rebated: general fertility screening in a woman with regular cycles and no specific concern

If not rebated, typical out-of-pocket cost is around $80–$120. Ask your GP whether your specific reason for testing is likely to meet a Medicare-eligible indication before you book.

🤔 Should I get one?

• You have irregular cycles or signs of PCOS — likely useful and Medicare-eligible
• You've been trying to conceive for 6–12+ months without success — part of a standard fertility workup your GP or specialist may order
• You're about to start chemotherapy — useful baseline before treatment
• You're considering egg freezing — helps predict likely egg yield, almost always self-funded
• You're asymptomatic, not trying to conceive, and just want "peace of mind" — the evidence above is worth reading first. A single AMH number in this situation often creates anxiety without giving you genuinely useful information about your actual fertility.

Talk to your GP about what you're hoping to learn from the test — that conversation often matters more than the result itself.

📋 Before your test

• Timing: can be done any day of your cycle — no need to time it around ovulation or your period
• Contraceptive pill: hormonal contraceptives can lower your result — mention if you're taking one, as it may affect interpretation
• Biotin supplements: high-dose biotin (vitamin B7, common in hair/skin/nail supplements) can cause a falsely low result — labs may ask people taking a high-dose supplement to pause it for 24 hours before the test; follow your lab’s instructions