Low AMH and Diminished Ovarian Reserve: What It Means for Your Fertility

Understanding what a low AMH means – and what it does not mean

Being told that you have a low Anti-Müllerian Hormone (AMH) level can understandably cause concern, particularly if you are trying to conceive or planning a pregnancy in the future. However, a low AMH result does not mean that you cannot become pregnant, and it does not necessarily mean that your eggs are of poor quality.

AMH is principally a marker of ovarian reserve – broadly, the number of eggs remaining within the ovaries. It is particularly useful in fertility treatment because it can help predict how the ovaries are likely to respond to stimulation during IVF. It is much less useful for predicting whether an individual woman will conceive naturally or via fertility treatment.

At Consilium Fertility Clinic, we therefore never interpret an AMH result in isolation. We consider it alongside your age, menstrual and reproductive history, antral follicle count (small fluid-filled sacs within the ovary) on specialist ultrasound, previous fertility treatment where applicable, and your individual plans for pregnancy.

The important question is not simply “Is my AMH low?”, but rather “What does my AMH mean for me?”

What is AMH?

Anti-Müllerian Hormone (AMH) is a hormone produced predominantly by the granulosa cells surrounding small developing follicles within the ovaries. These follicles contain immature eggs. As the number of follicles within the ovaries gradually declines with age, AMH levels generally decline as well. AMH can be measured using a blood test and, unlike some reproductive hormones, can usually be measured at any stage of the menstrual cycle. AMH is one of the principal tests used to estimate ovarian reserve.

What is diminished ovarian reserve?

Ovarian reserve refers to the remaining pool of eggs within the ovaries. Diminished ovarian reserve (DOR) describes a situation in which the number of remaining eggs, or the anticipated ovarian response to stimulation, is lower than expected.

Ovarian reserve naturally declines with age, although there is considerable variation between women of the same age. Some younger women have a lower ovarian reserve than expected, while some older women have a comparatively higher reserve. It is important to recognise that diminished ovarian reserve is not the same as infertility.

A woman can have a low ovarian reserve and continue to ovulate regularly and conceive naturally. Equally, having a high AMH does not guarantee natural conception or successful fertility treatment.

Does a low AMH mean I cannot get pregnant naturally?

No. This is one of the most important misconceptions surrounding AMH. AMH is not an accurate stand-alone predictor of your ability to conceive naturally. A low AMH primarily indicates a reduced ovarian reserve; it does not tell us whether an egg will be released that month, whether fertilisation will occur or whether an embryo will implant.

Female age, tubal health, ovulation, sperm quality and several other factors are important determinants of natural conception. For this reason, a low AMH result should not in itself be interpreted as a diagnosis of infertility.

Does low AMH mean poor egg quality?

No. Egg quantity and egg quality are different. AMH provides information predominantly about the quantity of eggs remaining rather than their chromosomal quality. Female age remains a much more important predictor of egg quality. For example, a woman aged 32 with a low AMH will generally be expected to have a higher proportion of chromosomally normal eggs than a woman aged 41 with a high AMH.

The younger woman may produce fewer eggs during an IVF cycle because of her lower ovarian reserve, but the eggs she does produce still have the age-related reproductive potential expected for someone in her early 30s. This distinction between egg number and egg quality is fundamental when interpreting a low AMH result.

Why is AMH important for IVF?

AMH becomes particularly useful when planning ovarian stimulation for IVF or egg freezing. Together with the antral follicle count (AFC) measured on ultrasound, AMH can help predict how the ovaries are likely to respond to fertility medication. A lower AMH may indicate that fewer follicles will respond to stimulation and therefore fewer eggs may be collected during an IVF cycle.

Conversely, a very high AMH may predict an excessive ovarian response and can be seen in women with polycystic ovarian morphology or polyendocrine metabolic ovarian syndrome (PMOS).

This information helps us individualise the stimulation protocol and medication dose. Importantly, even an extremely low AMH should not automatically exclude someone from IVF. The likely response, age, previous treatment and overall probability of success need to be considered together.

What is an antral follicle count?

An antral follicle count, or AFC, is an ultrasound assessment of the small follicles visible within both ovaries, usually at the beginning of the menstrual cycle. AMH and AFC provide complementary information about ovarian reserve and anticipated response to ovarian stimulation.

At Consilium Fertility Clinic, specialist fertility ultrasound allows us to assess not only the antral follicle count but also the ovaries, uterus and endometrial cavity. We believe this is important because ovarian reserve is only one component of fertility.

What causes a low AMH?

The most common reason for declining AMH is increasing female age, reflecting the natural reduction in the number of remaining follicles. However, a low AMH can also occur in younger women. Potential factors associated with diminished ovarian reserve include previous ovarian surgery, particularly surgery involving ovarian cysts or endometriomas, endometriosis, chemotherapy or pelvic radiotherapy, some genetic or chromosomal conditions, and a family history of premature ovarian insufficiency or early menopause. Sometimes no specific cause is identified.

AMH can also be temporarily influenced by certain circumstances. For example, hormonal contraception may suppress AMH measurements in some women. Results therefore need to be interpreted in their clinical context rather than relying solely on a laboratory reference range.

Does low AMH mean I will have an early menopause?

Not necessarily. Although AMH reflects ovarian reserve and progressively declines towards menopause, an individual AMH measurement cannot tell you precisely when you will reach menopause. A low AMH should therefore not be interpreted as a countdown to menopause.

If there are other features suggesting premature ovarian insufficiency – such as irregular or absent periods at a young age – further clinical and hormonal assessment may be required.

Can AMH be increased?

There is currently no established treatment that reliably restores the underlying ovarian reserve or creates new eggs. This is important because patients with low AMH are frequently exposed to claims that particular supplements or treatments can substantially increase their ovarian reserve.

Some interventions may alter response to ovarian stimulation without conclusive evidence that they have increased the number or quality of eggs or improved the chance of a live birth.

Our approach is therefore to concentrate on factors that can genuinely influence management: establishing an accurate assessment, considering age and reproductive plans, optimising general health, and choosing an appropriate fertility strategy where treatment is required. We will also discuss the evidence regarding the various supplements or medications.

What fertility treatment is available if I have low AMH?

There is no single treatment protocol that is appropriate for every woman with diminished ovarian reserve. Management depends on several factors, including your age, how long you have been trying to conceive, your AMH and antral follicle count. whether you are ovulating; fallopian tube health; semen parameters; previous pregnancies; previous fertility treatment and ovarian response; and whether you are currently trying to conceive or preserving fertility for the future.

Some women with low AMH may still have a reasonable opportunity to conceive naturally and may not require immediate IVF. For others, particularly where age is becoming an important consideration or there are additional fertility factors, proceeding to assisted conception may be appropriate.

The purpose of a specialist consultation is to distinguish between these situations rather than treating an AMH number alone.

Can women undergo IVF with low AMH?

Women with low AMH can undergo IVF. The principal challenge is that fewer follicles may respond to ovarian stimulation, resulting in fewer eggs being collected in an individual cycle. Unfortunately, there is also a risk of no eggs being collected, or with fewer eggs lack of embryos reaching a certain stage of embryo development. However, fewer eggs does not mean no chance of pregnancy.

Age remains particularly important. A younger woman who produces only a small number of eggs may still produce a chromosomally normal embryo capable of resulting in a healthy pregnancy. Conversely, retrieving a large number of eggs at an older reproductive age does not guarantee a chromosomally normal embryo or live birth.

Our objective is therefore not simply to maximise the medication dose or obtain the highest possible number of eggs. Treatment needs to balance the expected ovarian response, safety, previous response and the realistic probability of obtaining a viable embryo.

Should I use a higher dose of IVF medication if my AMH is low?

Not necessarily. It is understandable to assume that increasing the dose of ovarian stimulation medication will always result in more eggs. However, once an appropriate dose has been reached, progressively increasing gonadotrophin doses does not necessarily recruit follicles that are not available within that treatment cycle. At Consilium Clinic, we individualise the stimulation strategy taking into account AMH, antral follicle count, age, body weight and, importantly, any previous response to fertility medication. This is one reason why reviewing previous IVF cycles can be particularly valuable in women who have previously had a low ovarian response.

Should I consider egg freezing if my AMH is low?

This requires individual assessment. AMH is used to tailor the dose of stimulation and IVF protocol, but age is more important in determining the future reproductive potential of those eggs.

A younger woman with diminished ovarian reserve may wish to consider fertility preservation if she is not currently ready to start a family, particularly because ovarian reserve may decline further with time. However, a low AMH may mean that more than one stimulation cycle is required to accumulate the desired number of mature eggs.

We discuss the egg freezing process, success rates per thawed cycle, taking into account your age, ovarian reserve test results and the limitations of egg freezing carefully before recommending treatment.

When should I seek fertility advice?

You may wish to seek specialist advice if you have been found to have a low AMH, particularly if you are planning a pregnancy now or in the future. Earlier assessment can also be appropriate if you are over 35, have irregular or absent periods, have previously undergone ovarian surgery, have endometriosis, have a family history of premature menopause, have undergone chemotherapy or radiotherapy, have experienced previous unsuccessful fertility treatment, or are considering egg freezing.

A consultation does not necessarily mean that you will need fertility treatment. Sometimes the most appropriate recommendation is to continue trying naturally. In other circumstances, avoiding unnecessary delay may be important.

The purpose of assessment is to help you understand which situation applies to you.

Our approach to low AMH at Consilium Fertility Clinic

We believe that AMH should inform fertility treatment – it should not define your fertility. Our assessment may include a detailed review of your reproductive and medical history, previous fertility treatment, AMH and other relevant blood tests, specialist transvaginal ultrasound with antral follicle count, assessment of the uterus and ovaries and, where indicated, tubal and male-partner assessment.

If IVF is appropriate, your ovarian stimulation protocol is planned according to your individual ovarian reserve, age, ultrasound findings and previous response rather than using AMH as an isolated number.

For women who have already undergone unsuccessful IVF or experienced a poor response to stimulation, we can review the previous stimulation protocol, follicular response, egg collection, fertilisation, embryo development and transfer history before recommending further treatment.

Our aim is to provide a realistic assessment of both the opportunities and limitations of treatment and to help you make an informed decision about the next step.

A low AMH can be important, particularly when planning IVF, but it is only one part of the fertility picture.

It does not tell us that you cannot conceive naturally.

It does not directly measure egg quality.

It does not mean that IVF cannot work.

And it should never be considered without taking your age and individual circumstances into account.

If you have received a low AMH result and would like to understand what it means for your fertility, we can provide an individualised fertility and ovarian reserve assessment at Consilium Clinic. Book a consultation.