Dr Maggie Ju
Acupuncture London

How Do You Know Your Egg Quality for Fertility? Signs, Tests, and Ways to Support Your Reproductive Health

Understanding your egg quality can be an important step when trying to conceive. Whether you are planning a pregnancy soon, have been trying for a while, or simply want to understand your reproductive health, knowing how egg quality affects fertility can help you make informed decisions.

However, one important fact is worth remembering: you cannot determine your egg quality from symptoms alone. Your age, ovarian reserve, medical history, and certain fertility tests can provide useful information, but no single test can tell you exactly whether your eggs are healthy enough to result in a successful pregnancy.

In this article, we explore what egg quality means, how it can be assessed, the signs that may offer clues about your fertility, and what you can do to support your reproductive health.

What Is Egg Quality?

Egg quality refers to the health and developmental potential of an egg, particularly its ability to be fertilised, develop into a healthy embryo, and potentially result in a pregnancy.

A key factor in egg quality is the egg's chromosomes. An egg with the correct number of chromosomes has a better chance of developing normally after fertilisation. Eggs with chromosomal abnormalities are more likely to result in unsuccessful fertilisation, embryos that stop developing, or miscarriage.

Egg quality is closely associated with age because eggs accumulate changes over time. However, individual differences exist, and age alone cannot predict the outcome of every pregnancy.

It is also important to distinguish between egg quality and ovarian reserve. Ovarian reserve refers to the number of eggs remaining in the ovaries, while egg quality relates to their developmental potential. These are different aspects of fertility.

You may have a good ovarian reserve but still experience age-related changes in egg quality. Equally, a person with a lower ovarian reserve may still conceive naturally.

1. Your Age Can Provide an Important Clue

Age is one of the strongest indicators of egg quality.

Females are born with their lifetime supply of eggs. As time passes, both the number of remaining eggs and, particularly from the mid-30s onward, the proportion of eggs with chromosomal abnormalities tend to change.

Although fertility varies between individuals, the following general patterns are useful:

• Under 30: Egg quality is generally more favourable, although fertility problems can still occur.

• 30–34: Fertility remains relatively favourable for many people, but gradual age-related changes continue.

• 35–39: Egg quality and natural fertility decline more noticeably on average, with greater variation between individuals.

• 40 and older: The proportion of eggs with chromosomal abnormalities increases substantially, and conception may become more difficult.

These are general trends rather than individual predictions. A younger person can experience fertility challenges, while someone in their late 30s or 40s may still conceive.

Age does not tell you the precise quality of your eggs, but it is an important factor when interpreting fertility tests and deciding when to seek professional advice.

2. Regular Periods May Be a Positive Sign, but They Do Not Confirm Egg Quality

A regular menstrual cycle can suggest that you are ovulating consistently, which is helpful when trying to conceive.

For many adults, menstrual cycles occur approximately every 21–35 days. Predictable periods can make it easier to estimate the fertile window and time intercourse.

However, regular periods do not necessarily mean your eggs are of good quality. Ovulation and egg quality are separate processes.

Similarly, irregular periods do not automatically mean poor egg quality. They may indicate an underlying issue, such as polycystic ovary syndrome (PCOS), thyroid dysfunction, elevated prolactin, or changes in ovarian function.

If your periods are persistently irregular, absent, unusually heavy, or significantly different from your usual pattern, speak with a healthcare professional to investigate possible causes.

3. Fertility Tests That Can Help Assess Your Ovarian Health

Although there is no routine blood test that directly measures the complete quality of an individual egg, several investigations can help assess ovarian function and provide information about your fertility.

Anti-Müllerian Hormone (AMH) Test

The AMH test measures a hormone produced by small follicles in the ovaries.

It is commonly used to estimate ovarian reserve and can help predict how the ovaries might respond to fertility medication during IVF.

A higher AMH level does not necessarily mean better egg quality, and a lower level does not mean you cannot conceive naturally. AMH is most useful when interpreted alongside your age, medical history, ultrasound findings, and fertility goals.

Follicle-Stimulating Hormone (FSH) Test

FSH is a hormone involved in the development of ovarian follicles. It is often measured early in the menstrual cycle, usually alongside oestradiol.

Higher-than-expected FSH levels can sometimes indicate reduced ovarian reserve. However, FSH levels can fluctuate between cycles, so one result cannot provide a complete picture of fertility.

Antral Follicle Count (AFC)

An antral follicle count is performed using a transvaginal ultrasound to count the small follicles visible in the ovaries.

This test helps estimate ovarian reserve and predict the likely response to ovarian stimulation during fertility treatment. It does not directly measure the chromosomal health or developmental potential of the eggs inside those follicles.

Other Hormone Tests

Depending on your symptoms and medical history, your clinician may recommend tests such as thyroid function or prolactin. These do not measure egg quality directly, but they can help identify conditions that may interfere with ovulation or conception.

The key takeaway: AMH, FSH, and antral follicle count mainly help assess ovarian reserve. None can reliably confirm whether your eggs are genetically normal or guarantee your chances of pregnancy.

4. Can You Tell If You Have Good Egg Quality From Symptoms?

One of the most common fertility questions is whether the body shows signs of good or poor egg quality.

Unfortunately, there are no specific physical symptoms that reliably reveal egg quality.

You may have regular periods, experience clear ovulation symptoms, and feel healthy, yet still have age-related changes in egg quality. Equally, having no obvious fertility symptoms does not mean there is a problem.

Some signs can provide clues about reproductive health, including:

• Predictable menstrual cycles.

• Signs of ovulation, such as changes in cervical mucus.

• Menstrual cycles that remain relatively consistent over time.

• No known reproductive conditions that could affect conception.

These may be reassuring indicators of aspects of reproductive function, but they cannot confirm that your eggs are healthy.

Likewise, symptoms such as irregular periods, hot flushes, or missed periods may warrant medical assessment, particularly if they occur at a younger age. They do not, by themselves, prove that egg quality is poor.

Rather than relying on symptoms, consider a fertility assessment if you have concerns about your ability to conceive.

5. Can Egg Quality Be Improved Naturally?

Although no diet, supplement, or lifestyle change has been proven to reverse age-related egg deterioration, healthy habits can support general reproductive health and help prepare your body for pregnancy.

Eat a Balanced, Nutrient-Rich Diet

Take Folic Acid Before Pregnancy

Avoid Smoking and Recreational Drugs

Maintain a Healthy, Sustainable Lifestyle

Regular physical activity, sufficient sleep, and maintaining a healthy weight can support metabolic and hormonal health.

Both very low body weight and significant excess weight may affect ovulation or pregnancy outcomes. However, lifestyle changes cannot guarantee improved egg quality, and people of all body sizes can experience fertility difficulties.

Regular acupuncture can have benefit supporting fertility.

6. Does Egg Quality Affect Your Chances of Getting Pregnant?

Yes. Egg quality can influence whether fertilisation occurs, whether an embryo develops normally, and whether a pregnancy continues successfully.

However, egg quality is only one part of fertility. Other factors include sperm quality, fallopian tube health, ovulation, uterine health, and the timing of intercourse.

An egg with good developmental potential still needs to be fertilised by sperm and develop in a suitable environment. This is why fertility assessments often consider both partners rather than focusing exclusively on the eggs.

7. Can IVF Tell You More About Your Egg Quality?

In some circumstances, IVF provides additional information about egg and embryo development.

During IVF, eggs are collected after ovarian stimulation and assessed by an embryologist. The laboratory can evaluate their maturity, observe fertilisation, and monitor embryo development.

These observations can offer useful information, but even an egg that looks mature and normal under a microscope may have chromosomal abnormalities.

In selected cases, preimplantation genetic testing for aneuploidy (PGT-A) can assess the chromosome complement of cells from an embryo. However, this is an embryo test, not a direct test of an individual egg, and it does not guarantee implantation or a successful pregnancy.

IVF is not usually necessary simply to find out your egg quality. Whether fertility treatment or further investigations are appropriate depends on your age, medical history, duration of trying to conceive, and individual circumstances.

8. When Should You Seek a Fertility Assessment?

Consider speaking with your GP or a fertility specialist if you have concerns about your reproductive health.