Tag: AMH levels by age UK

Anti-Mullerian Hormone (AMH) is one of the most talked-about markers in fertility and reproductive health. It is often described as a measure of ovarian reserve, which means the number of eggs remaining in the ovaries. While much of the conversation focuses on low AMH, receiving a high result can raise its own set of questions. Does high AMH mean you are more fertile? Does it mean you have polycystic ovaries? Could it be linked to PMOS ( formerly known as PCOS)? And does having high AMH mean it will be easier to get pregnant? The answer is more nuanced than a simple yes or no. High AMH levels usually suggest that your ovaries contain a higher-than-expected number of small follicles for your age. This may be linked to polycystic ovaries, PMOS or natural variation. However, AMH does not measure egg quality, does not confirm whether you are ovulating regularly, and does not predict whether you will conceive naturally. In this guide, we explain what high AMH levels mean for fertility, what causes it, how it relates to PCO and PMOS, what it can mean for IVF, and how Hertility interprets your AMH result as part of your wider hormone health. If you haven’t yet tested your AMH, our Advanced At-Home Hormone & Fertility Test can measure AMH alongside up to nine other key hormones, giving you a personalised, clinically meaningful picture of your reproductive health. Quick Facts What is AMH? Anti-Müllerian hormone (AMH)  is a hormone made by small fluid-filled sacs in the ovaries called follicles, each of which contains an immature egg. Because AMH is made by these follicles, it gives an indication of how many eggs you have remaining at a given time. This is known as your ovarian reserve. Ovarian reserve refers to egg quantity, not egg quality. This distinction is important. AMH can help estimate the number of eggs remaining, but it cannot tell you whether those eggs are genetically healthy, whether they will fertilise, or whether they will develop into a viable pregnancy. Unlike hormones such as FSH, oestradiol, and LH, which fluctuate significantly across the menstrual cycle, AMH remains relatively stable. This means it can usually be measured at any point in the cycle and still provide useful information. However, recent studies have shown that there may be some slight variation in AMH levels across the menstrual cycle, but this variation remains considerably smaller than that seen in other reproductive hormones. As a result it is still considered one of the most stable and reliable markers of ovarian reserve. It is also routinely used when someone is considering undergoing a fertility treatment to estimate how the ovaries are likely to respond to fertility medication, guide medication dosage, and inform treatment planning. For a deeper dive into everything AMH testing can and can’t tell you, including its role in identifying  PMOS and guiding fertility treatment, read our full guide: What Does AMH Testing Tell You? 5 Key Insights About Your Fertility What Does “High AMH” Actually Mean? When we refer to “high AMH,” we mean a result that falls above the expected range for your age group. Because AMH naturally declines as you get older, what counts as “high” is always interpreted relative to age-specific reference ranges, not a single universal cutoff. A high result suggests that your ovaries contain a larger-than-expected number of small follicles for someone your age. In practical terms, this means there is more AMH being made and circulating in the bloodstream. In isolation, this is not harmful, but is a signal worth investigating further, as it is closely associated with certain hormonal and reproductive health conditions. Does High AMH Mean I Am Very Fertile? This is the most common and potentially most consequential misconception about high AMH results. A high result can feel like good news, more eggs must mean better fertility, right? In fact, this is not necessarily true. High AMH levels are not automatically good or bad for fertility. AMH tells you about egg quantity. It does not tell you anything about egg quality, that is, how healthy those eggs are, how likely they are to be fertilised, or how likely they are to develop into a viable embryo. Egg quality is influenced primarily by age and genetics, and there is currently no reliable way to measure it directly outside of assessing embryos created during IVF. Beyond egg quality, fertility depends on many factors that AMH cannot assess at all; whether you are ovulating regularly, the health of your fallopian tubes and uterus, and sperm health. A high result offers no reassurance about any of these. In short: a high AMH result does not predict your ability to conceive naturally, and should not delay seeking help if you have concerns about conceiving. What Causes High AMH Levels? A high AMH result reflects a greater number of small follicles in the ovaries than would be expected for your age. The most common reasons for this include: Unlike low AMH, a high result is not associated with previous surgery, cancer treatment, or lifestyle factors. In the vast majority of cases, the underlying explanation is PCO,  PMOS, or natural variation, and your full hormone panel and clinical history will help clarify which. What conditions can high AMH indicate? Polycystic ovaries (PCO) PCO is a common reproductive health condition affecting around 30% of people with ovaries of reproductive age. It is characterised by a higher-than-expected number of small, immature follicles in the ovaries, which is precisely why AMH levels tend to be elevated in people with PCO. More follicles indicates more AMH being produced. Importantly, PCO on its own is benign. It does not affect fertility and does not cause symptoms in most people. It is often identified incidentally, during an ultrasound, or increasingly, through a high AMH result. <p>Because AMH is so closely associated with follicle count, updated clinical guidelines now allow AMH to be used as an indicator of polycystic ovaries in place of an ultrasound scan for the […]

Anti-Mullerian Hormone (AMH) is one of the most talked-about markers in reproductive health, providing an insight into your hormonal health and ovarian reserve. But receiving a “low” AMH result can feel alarming, especially when you’re not sure what it actually means. The good news is that a low AMH is not a confirmation that you cannot conceive naturally. In this article, we explore what it means to have a low or out-of-range AMH result, what causes it, and what your options are; whether you’re trying to conceive now, or simply planning for the future. If you haven’t yet tested your AMH, our Advanced At-Home Hormone & Fertility Test can measure AMH alongside up to nine other key hormones, giving you a personalised, clinically meaningful picture of your reproductive health. Quick Facts: A low AMH result indicates a lower-than-expected ovarian reserve for your age, but does not mean you cannot conceive naturally AMH measures egg quantity only, it tells you nothing about egg quality, which is one of the most important factors in conception AMH naturally declines throughout life; a low result does not mean you have done anything to cause it. Certain factors, including hormonal contraception and some medical conditions can temporarily affect AMH levels. Low AMH may have implications for IVF planning and NHS eligibility, but a low result does not close the door on treatment Your AMH result should never be interpreted in isolation, it only makes sense alongside your age, other hormones, and clinical history What is AMH and what does it measure? Anti-Müllerian hormone (AMH)  is a hormone made by small fluid-filled sacs in the ovaries called follicles, each of which contains an immature egg. Because AMH is made by these follicles, your AMH level gives an indication of how many eggs you have remaining at a given time. This is known as your ovarian reserve. Unlike hormones such as FSH, oestradiol, and LH, which fluctuate significantly across the menstrual cycle, AMH remains relatively stable. This stability is one of the key reasons it became widely adopted in reproductive medicine: it can be measured on any day of your cycle and still give a meaningful result. It is worth noting, however, that more recent studies have shown that there may be some slight variation in AMH levels across the menstrual cycle, but this variation remains considerably smaller than that seen in other reproductive hormones. As a result AMH is still considered one of the most stable and reliable markers of ovarian reserve. AMH is now routinely used when someone is considering undergoing a fertility treatment to estimate how the ovaries are likely to respond to stimulation, guide medication dosage, and determine eligibility for treatment. For a deeper dive into everything AMH testing can and can’t tell you, including its role in identifying PCOS and guiding fertility treatment, read our full guide: What Does AMH Testing Tell You? 5 Key Insights About Your Fertility What Does “Low AMH” Actually Mean? When we refer to “low AMH,” we mean a result that falls below the expected range for your age group. Because AMH naturally declines as you get older, what counts as “low” is always interpreted relative to age-specific reference ranges, not a single universal cutoff. A low AMH result can suggest that your ovarian reserve may be lower than expected for someone your age. This is sometimes referred to as having a Diminished Ovarian Reserve (DOR). However, it is important to emphasise that a lower ovarian reserve does not automatically mean reduced fertility or an inability to conceive naturally. The most important thing to understand: AMH measures quantity, not quality This distinction is worth repeating, because it is the most common source of confusion and unnecessary distress after receiving a low AMH result. AMH tells you about egg quantity. It does not tell you anything about egg quality. Egg quality i.e. how healthy eggs are, how likely they are to be fertilised, and how likely they are to develop into a viable embryo is influenced primarily by age and genetics. Currently there is no reliable way to measure it directly outside of accessing embryos created during IVF. This matters enormously in practice. Research consistently shows that AMH levels alone are not strongly predictive of natural pregnancy rates. People with low AMH conceive naturally every day. Conversely, a normal or high AMH result does not guarantee fertility. Fertility is shaped by many factors: ovulation, sperm health, Fallopian tube function, uterine health, and overall wellbeing. In short: a low AMH result is not a diagnosis of infertility. Hertility’s own research found no significant association between low AMH and risk of miscarriage or recurrent pregnancy loss, an important finding that further underscores the limitations of AMH as a standalone predictor of pregnancy outcomes. What Causes Low AMH? In most cases, there is no single identifiable “cause” of a low AMH level in the way we typically think about causes of illness. It is important to know that if you have received a low AMH result, nothing you’ve done has caused this. AMH levels follow a natural trajectory across the reproductive lifespan; it peaks in the early-to-mid twenties, and then gradually declines toward menopause. This decline is a normal part of reproductive ageing, and the rate at which it happens varies between individuals, largely due to genetics. Some factors that may be associated with lower AMH levels include: Age – the most significant driver of declining AMH Genetics – family history can influence the rate of ovarian ageing Previous ovarian surgery – procedures to remove ovarian cysts or tissue (for example endometriosis) may reduce ovarian reserve Certain autoimmune conditions – which can affect ovarian function, for example Hashimoto’s disease, rheumatoid arthritis, and Addison’s disease. Cancer treatment – some types of chemotherapy and radiotherapy are referred to as gonadotoxic (i.e. toxic to the gonads such as the ovary) which can impact the ovaries Hormonal contraception – can cause a temporary, reversible reduction in AMH levels, typically by 15% to 30% and […]