What is AMH?
Anti-Müllerian Hormone (AMH) is produced by small, developing follicles in your ovaries. These follicles contain immature eggs, and measuring AMH helps estimate your ovarian reserve, or the number of eggs you may have remaining. As AMH levels naturally decline with age, it is a useful indicator when assessing fertility.
AMH also provides insight into how your ovaries may respond to treatment, helping guide approaches such as IVF and medication planning. It can also highlight potential conditions such as PCOS.
However, AMH is only one part of the wider fertility picture. It does not indicate egg quality, confirm whether you can conceive naturally, predict your chances of pregnancy, or determine when menopause will occur. For a more complete understanding, AMH results are assessed alongside an ultrasound scan (AFC) and your medical history.
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Understanding Your AMH Results
AMH levels are measured as a number (pmol/L in the UK) and can help indicate your ovarian reserve. While ranges can vary slightly, they are typically interpreted as:
- Higher AMH: May suggest a higher ovarian reserve or be linked to conditions such as PCOS
- Average AMH: Generally reflects an ovarian reserve in line with your age
- Lower AMH: Indicates a reduced ovarian reserve
It’s important to view these results in context, as AMH alone cannot provide a full picture of fertility. A lower level does not mean pregnancy is impossible, and a higher level does not guarantee it.
How AMH Levels Change Due to Age
AMH levels naturally decline as you get older, reflecting the gradual reduction in your ovarian reserve. In your 20s, AMH is typically at its highest, before starting to decrease through your 30s. This decline becomes more noticeable in your late 30s and 40s, as both the number of eggs and overall fertility potential reduce over time.
While this pattern is expected, AMH levels can vary between individuals. Age provides important context when interpreting your results, which is why both factors are always considered together during a fertility assessment.
Endocrine Connectivity: How AMH, FSH, and Estradiol Work Together
AMH is just one part of a wider hormonal system that regulates your reproductive health. It works alongside Follicle-Stimulating Hormone (FSH) and oestradiol to provide a more complete picture of how your ovaries are functioning. AMH indicates ovarian reserve, FSH supports follicle development, and oestradiol reflects how those follicles are maturing.
When assessed together, these hormones give a clearer picture of how your ovaries are functioning – and support more accurate fertility assessment.
The Implications of Low AMH: From Diminished Ovarian Reserve to Premature Ovarian Failure
Being told your AMH is low can feel overwhelming, but it’s important to look at it in context.
A low AMH suggests you may have fewer eggs remaining than expected for your age, but it does not define your ability to conceive.
Key points about low AMH:
- You can still get pregnant naturally – AMH reflects egg quantity, not quality or ovulation, and many women with low AMH do conceive
- Timing may be important – A lower ovarian reserve can mean a shorter fertility window, so planning ahead can be beneficial
- Response to IVF may be lower – Fewer eggs may be collected, but successful outcomes are still achievable
- It supports personalised care – Your AMH result helps guide the most suitable approach for you
If your AMH is low, we will:
- Review your full fertility profile, including ultrasound scans and hormone tests
- Discuss your options and likely timelines
- Create a personalised plan to support your fertility goals
You’ll receive clear, supportive guidance at every stage.
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AMH vs. AFC Fertility Testing
AMH testing is a simple blood test that can be done at any time in your cycle, with no preparation needed. It’s sometimes included as part of an initial consultation or a full fertility assessment.
AMH is just one part of a comprehensive evaluation designed to give you clarity and direction. Your assessment may also include your medical and reproductive history, additional hormone testing, an ultrasound scan (AFC), and semen analysis where appropriate.
To build the most accurate picture of your reproductive potential and ovarian reserve, clinicians assess two key markers: Anti-Müllerian Hormone (AMH) and Antral Follicle Count (AFC).
- AMH (Blood Test): AMH levels generally reflect how many eggs you have remaining.
- AFC (Ultrasound Scan): This is a transvaginal ultrasound performed at the start of your cycle. It measures the number of early-stage (antral) follicles in your ovaries, helping us to estimate your egg supply.
By looking at these together, we can build a complete picture of your fertility, identify any potential challenges, and recommend the most suitable next steps.
FAQs about Low AMH and Ovarian Reserve
Can AMH predict my chances of getting pregnant?
Not directly. AMH reflects ovarian reserve (egg quantity), rather than egg quality or overall reproductive potential. Conception is influenced by multiple factors, including age, ovulatory function, tubal patency, and partner sperm parameters.
Should I have AMH tested if I’m not trying to conceive yet?
Yes. AMH can provide an indication of your ovarian reserve and help inform your reproductive timeline. This can support forward planning, including considerations such as fertility preservation through egg freezing (oocyte cryopreservation).
Does AMH change over time?
Yes, AMH levels decline naturally with age as ovarian reserve decreases. This age-related decline is why timing can be an important factor when considering fertility planning or treatment.
Can I improve my AMH level?
AMH levels themselves cannot be significantly increased, as they reflect the underlying ovarian reserve. The focus is instead on optimising overall reproductive health, and selecting the most appropriate evidence-based treatment approach.
Start Your Fertility Journey with Confidence
Understanding your AMH is a powerful first step. At Concept Fertility Clinic, we combine expert care with clear, personalised guidance to help you make informed decisions about your future.
