Female Fertility: Understanding and Supporting Your Fertility Potential

If you're starting to think about trying to conceive, or you've been trying for a while and want to understand what's going on in your body, it helps to have a clear, honest picture of what fertility actually involves. This page is designed to be that starting point.

We'll walk through what "fertility potential" means, what can affect it, and how nutrition, lifestyle, hormone health and conditions such as PMOS (also known as PCOS) or endometriosis fit into the picture. Throughout, we've linked to more detailed Zita West guides where you want to go deeper on a specific topic, along with our free download, expert webinars and 1:1 support if you'd like more personalised help.

Nothing here is designed to alarm you or promise a particular outcome. Fertility is rarely about one single factor, and there is a lot you can understand, and in many cases support, before you ever need to think about treatment.

What does fertility potential mean?

"Fertility potential" simply means how likely you are to conceive naturally at any given point in time. It isn't a fixed number, and it isn't something a single test can tell you in isolation. It's shaped by several interconnected factors:

• Ovulation: whether, and how regularly, an egg is released each cycle.
• Egg quality: the genetic and cellular health of the eggs available that cycle.
• Ovarian reserve: an estimate of the number of eggs remaining, which naturally declines with age.
• Fallopian tubes: whether they're open and able to allow the egg and sperm to meet.
• Womb lining: whether the endometrium can support implantation.
• Cervical health: including cervical mucus, which helps sperm travel towards the egg.
• Timing of sex: having sex regularly across the fertile window, not only on the day of ovulation.
• Sperm health: sperm count, motility and quality.
• Lifestyle and emotional wellbeing: sleep, stress, nutrition, alcohol, smoking and overall health.

It's worth saying clearly: fertility is not only about the woman. Roughly half of fertility concerns involve a male factor, so sperm health is part of this picture from the very beginning, not an afterthought.

What affects female fertility?

Many things can influence female fertility, some more significant than others. Here's a broad overview of the main factors, in short, easy-to-scan form. (A few of these, such as PMOS / PCOS and endometriosis, are covered in more depth further down this page.)

• Age. One of the strongest and most consistent factors in female fertility. Both the number and the quality of eggs decline over time, particularly from the mid-30s onwards, which is why age is factored into how quickly fertility investigations are usually offered.
• Egg quality. Relates to the genetic and cellular health of an egg, including mitochondrial function, which affects how well an egg can be fertilised and support a healthy pregnancy. Influenced by age, but also, to some extent, by nutrition, oxidative stress and lifestyle.
• AMH and ovarian reserve. AMH testing can give an indication of ovarian reserve, but it does not measure egg quality and does not, on its own, predict whether you can conceive naturally.
• Ovulation and cycle regularity. Regular ovulation is central to natural conception. Irregular, infrequent or absent periods can be a sign that ovulation isn't happening consistently, and it's worth mentioning to a GP.
• Hormone balance. Oestrogen, progesterone, LH, FSH, insulin and thyroid hormones all interact to support ovulation and a receptive womb lining. Imbalances anywhere in this system can affect fertility.
• PMOS / PCOS. Affects around 1 in 10 women of reproductive age and can disrupt ovulation and hormone balance.
• Endometriosis. Affects around 1 in 10 women and those assigned female at birth of reproductive age in the UK, and may affect fertility through inflammation, pain, pelvic changes or effects on egg quality and implantation.
• Thyroid health. An underactive or overactive thyroid can disrupt the menstrual cycle and ovulation, which is why thyroid function is often checked as part of fertility investigations.
• Anaemia. Low iron levels can contribute to fatigue and, in some cases, cycle irregularities, so it's worth having iron status checked, especially with heavy periods.
• Coeliac disease. Undiagnosed coeliac disease can affect nutrient absorption and has been linked with fertility difficulties in some women, which is why it's sometimes screened for during investigations.
• Low-grade inflammation. Ongoing, low-level inflammation in the body may be relevant to fertility, particularly alongside PMOS / PCOS, endometriosis or unexplained fertility concerns.
• Stress and emotional wellbeing. Trying to conceive can be emotionally demanding, and chronic stress may interact with the hormonal signals that regulate ovulation. Supporting your emotional wellbeing is a legitimate part of a fertility plan, not an indulgence.
• Sleep. Supports the hormonal rhythms involved in the menstrual cycle and general health, so poor or disrupted sleep is worth addressing where possible.
• Alcohol, smoking and caffeine. Smoking is consistently linked with reduced fertility and lower egg quality. High alcohol intake and high caffeine intake are also generally advised against when trying to conceive, and are worth reviewing.
• Nutrition and nutrient status. Folate, vitamin D, iron, omega-3s and antioxidants all play a role in reproductive health, egg development and hormone balance. We cover this in more detail below.

How to improve your chances of getting pregnant

There's no single action that guarantees conception, but there are practical, well-supported habits that may help support your chances:

• Understand your fertile window. This is roughly the five days before ovulation and the day of ovulation itself, when conception is most likely.
• Have sex regularly across the cycle, not only on the day you think you're ovulating. Every two to three days is a reasonable, low-stress approach.
• Track your cycle to understand your pattern, but try not to let it take over. Overly rigid tracking can add stress without adding much extra information for most people.
• Support nutrition and blood sugar balance, which play a role in ovulation and hormone regulation.
• Review alcohol, smoking and caffeine, ideally cutting down or stopping well before you start trying.
• Prioritise sleep and stress regulation wherever you can.
• Consider male fertility from the start. Sperm health, alcohol, smoking, heat exposure and general lifestyle all matter too.
• Know when to seek help. Current NICE guidance suggests offering fertility investigation after a year of trying for most couples, with earlier specialist assessment recommended for women aged 36 or over, or where there's a known or suspected cause. We cover this in more detail further down this page.

Learn more: practical steps to support fertility and our Getting Pregnant Faster webinar with Zita West.

AMH, ovarian reserve and egg quality

AMH (Anti-Müllerian Hormone) is one of the most talked-about fertility tests, so it's worth being clear about what it can, and can't, tell you.

• AMH can help indicate your ovarian reserve, an estimate of the number of eggs remaining.
• AMH does not directly measure egg quality.
• AMH alone does not predict whether you can conceive naturally. Many women with a lower-than-average AMH conceive without treatment.
• Age remains one of the strongest fertility factors, often more predictive of natural conception chances than a single AMH result.
• Women with PMOS / PCOS may have higher AMH levels, because the additional follicles associated with the condition produce more of the hormone. A high AMH in this context doesn't necessarily mean a straightforward path to conception.
• A low AMH result can be upsetting, and it's a number that's easy to over-interpret on its own. It's worth discussing what it does and doesn't mean with a fertility specialist or your GP, rather than researching it in isolation.

Egg quality is a separate, and in many ways more important, piece of the picture. It's influenced by age, mitochondrial function (the "energy engines" inside each egg), oxidative stress, nutrition, lifestyle and overall health. Mitochondrial function in particular is an area of growing interest in fertility, because eggs need a huge amount of cellular energy to mature, be fertilised and support early embryo development.

Learn more: how to support egg quality naturally, how much CoQ10 to consider taking, or watch our From Egg to Embryo webinar on mitochondrial health and egg quality.

Female fertility nutrition and nutrients

Nutrition doesn't work in isolation, but it does play a supporting role in several of the processes involved in fertility: egg development, mitochondrial function, ovulation, hormone balance, blood sugar regulation, inflammation, the vaginal and reproductive microbiome, and generally preparing the body before trying to conceive or IVF.

The section below is a brief, high-level overview of the main nutrient areas we're asked about most. Each one has its own more detailed guide if you want to read further, so we haven't repeated the full picture here.

Folate

Folate supports healthy cell division and is recommended before and during early pregnancy to help reduce the risk of neural tube defects. Most women trying to conceive are advised to take a folate or folic acid supplement.

Vitamin D

Vitamin D is involved in hormone regulation and immune function, and many people in the UK have lower levels than recommended, particularly over autumn and winter.

Omega-3 (DHA)

Omega-3 fatty acids, particularly DHA, are structural components of cell membranes and may play a role in egg quality and, later, in foetal brain development.

Choline

Choline supports neural tube development and liver function, and intake is often lower than recommended, especially for those who don't eat much egg or liver.

CoQ10 / Ubiquinol

CoQ10 is involved in mitochondrial energy production. Natural levels decline with age, which is part of why it's often discussed in the context of egg quality and fertility over 35.

Magnesium

Magnesium is involved in hundreds of processes in the body, including hormone regulation, blood sugar balance and stress response, all of which are relevant to fertility.

Inositol

Myo-inositol is widely researched in relation to ovulation and insulin sensitivity, and is particularly relevant for women with PMOS / PCOS or insulin resistance.

Probiotics and the vaginal microbiome

A balanced vaginal and gut microbiome may be relevant to hormonal balance and the implantation environment, an area of growing research interest in fertility.

Iron

Iron supports oxygen transport and energy levels, and is particularly important to monitor for women with heavy periods or reduced meat intake.

B vitamins

B vitamins, including B12 and B6, support energy metabolism and hormone regulation, and are especially relevant for those following a vegetarian or vegan diet.

Zinc

Zinc is involved in hormone production and cell division, and has a role in both female and male fertility.

Antioxidants (including NAC and vitamin C)

Antioxidants, such as NAC and vitamin C, may help support cells against oxidative stress, which is one of the factors thought to be relevant to egg quality as we age.

Supplements cannot replace medical advice, diagnosis or treatment, but they can help support nutritional foundations when chosen appropriately for your stage and needs. If you'd like to go deeper on any of the nutrients above, our related guides cover the detail: choline and inositol, magnesium and hormone balance, and lesser-known fertility nutrients. When you're ready to think about a routine rather than individual nutrients, this guide to building a fertility supplement routine by stage is a good next stop, and our full range of female fertility supplements and vitamins is there when you want to browse.

Lifestyle foundations for female fertility

Nutrition is only part of the picture. So the page doesn't tip too far towards supplements, it's worth setting out the wider lifestyle foundations that are just as relevant:

• Cycle awareness and fertile window timing, so you know roughly when you're most likely to conceive.
• Regular sex throughout the cycle, not only on the day you believe you're ovulating.
• A Mediterranean-style eating pattern, rich in vegetables, whole grains, oily fish and healthy fats, which is one of the more consistently discussed dietary patterns in fertility research.
• Protein, fibre and blood sugar balance at meals, to help support stable energy and hormone signalling.
• Healthy fats and oily fish, a natural source of omega-3s.
• Sleep and circadian rhythm, which underpin much of the body's hormonal regulation.
• Stress and emotional wellbeing, supported in whatever way works for you, whether that's therapy, acupuncture, exercise or simply more rest.
• Moderate movement, rather than very high-intensity or excessive exercise, which can sometimes disrupt cycles.
• Avoiding smoking, which is one of the most consistently evidenced lifestyle factors linked to reduced fertility.
• Reviewing alcohol and caffeine intake.
• Reducing exposure to endocrine-disrupting chemicals where practical, for example by choosing glass over plastic food storage and being mindful of some fragranced products.
• Male fertility and sperm health, as part of the wider conception picture from the outset.

Learn more: Improving Fertility: 5 Steps to Take, Age and Fertility, building a fertility supplement routine by stage, or watch our Getting Pregnant Faster webinar.

Conditions that can affect female fertility

PMOS / PCOS

PCOS, now referred to as PMOS following the 2026 terminology update, can affect ovulation, cycle regularity and hormone balance, often via insulin resistance. Nutrition, blood sugar balance, vitamin D and inositol are commonly discussed as relevant areas of support, alongside any care from a GP or specialist. This isn't a treatment claim, more a starting point for a conversation with a healthcare professional about what might help in your individual case.

Learn more: PMOS fertility support, our PCOS and fertility support guide, inositol for fertility, myo-inositol and folate for PCOS / insulin resistance, or watch our Endometriosis and PMOS / PCOS webinar.

Endometriosis

Endometriosis may affect fertility through inflammation, pain, changes to pelvic anatomy, effects on egg quality, or the environment the embryo needs to implant into. Diagnosis can take a long time (on average over nine years from first GP visit in the UK), so if your symptoms and history suggest it, professional medical support and, where appropriate, a referral to a specialist, matters.

Learn more: endometriosis and the fertility journey, or watch our Endometriosis and PMOS / PCOS webinar.

Low-grade inflammation

Ongoing, low-level inflammation may be relevant to fertility, particularly in the context of PMOS / PCOS, endometriosis or unexplained fertility concerns. It's an area of growing interest rather than a settled, one-size-fits-all story, and it's worth discussing with a healthcare professional if you have one of these conditions.

Learn more: watch our Inflammation: The Silent Factor Affecting Fertility webinar.

Irregular cycles

Cycle regularity matters because it's usually the clearest outward sign of whether, and how consistently, ovulation is happening. Persistently irregular or absent cycles are worth mentioning to a GP rather than waiting it out.

Low AMH

A low AMH result can indicate a lower ovarian reserve, but it doesn't define your entire fertility potential. Age, egg quality and overall reproductive health all matter too, which is why a low result is best interpreted with professional support rather than in isolation.

Over 35

Age affects both egg quantity and quality, and this is one of the reasons earlier support, whether that's testing, lifestyle changes or a specialist conversation, may be helpful if you're over 35 and thinking about trying, or already trying.

Learn more: Age and Fertility: Key Factors to Know.

Not sure where to start?

If, having read through the above, you want a straightforward first step, these are two of the products we're asked about most in relation to egg quality and general nutritional foundations. They're a starting point, not a requirement, and neither replaces personalised advice.

Vitafem

A foundational fertility multivitamin covering many of the nutrients discussed above (including folate and vitamin D) in one formula, for a straightforward starting point before adding anything more targeted.

Shop Vitafem

For a wider look at nutrients and routines by stage, see our full range of female fertility supplements and vitamins.

Watch expert female fertility webinars

If you learn better by watching and listening, our free webinar library covers many of the topics on this page in more depth, led by fertility expert Zita West and colleagues.

When to seek fertility support

Current NICE guidance recommends offering fertility investigation after a year of trying for most couples. It's worth seeking help sooner, rather than waiting, if:

• You're under 36 and have been trying for 12 months without success.
• You're 36 or over. Current guidance recommends specialist assessment at presentation, without needing to wait a year.
• Your cycles are irregular or absent.
• You have a known or suspected condition such as PMOS / PCOS, endometriosis, thyroid disease, a previous pelvic infection, or a history of recurrent miscarriage.
• There are known male fertility concerns.
• You feel anxious about your fertility, or would simply like personalised support sooner. You don't need to wait for a specific milestone to ask for help.

If you'd like tailored, 1:1 guidance rather than general information, our team offers a free 1:1 fertility product consultation, where you can talk through your individual situation with a specialist.

Frequently asked questions

What does female fertility mean?

Female fertility refers to a woman's ability to conceive naturally, which depends on ovulation, egg quality, ovarian reserve, the fallopian tubes, the womb lining, cervical health and overall hormone balance.

What affects female fertility?

Age, egg quality, ovarian reserve, ovulation and cycle regularity, hormone balance, conditions such as PMOS / PCOS or endometriosis, thyroid health, nutrition, and lifestyle factors such as sleep, stress, alcohol and smoking can all affect female fertility.

How can I improve my chances of getting pregnant?

Understanding your fertile window, having sex regularly across your cycle, supporting nutrition and blood sugar balance, reviewing alcohol, smoking and caffeine, prioritising sleep and stress management, and considering male fertility from the start may all help support your chances.

What is AMH and what does it tell me?

AMH (Anti-Müllerian Hormone) is a blood test that can give an indication of ovarian reserve. It does not measure egg quality and does not, on its own, predict whether you can conceive naturally.

Does low AMH mean I cannot get pregnant?

No. A low AMH result can indicate a lower ovarian reserve, but many women with lower AMH levels conceive naturally. Age and egg quality both matter alongside AMH, and a low result is best discussed with a fertility specialist.

What affects egg quality?

Egg quality is influenced by age, mitochondrial function, oxidative stress, nutrition, lifestyle and overall health.

Can nutrition support female fertility?

Nutrition plays a supporting role in egg development, hormone balance, ovulation and general reproductive health, though it cannot replace medical advice, diagnosis or treatment where these are needed.

Which vitamins are important when trying to conceive?

Folate, vitamin D, omega-3 DHA, choline, CoQ10, magnesium, iron, B vitamins, zinc and antioxidants are commonly discussed nutrients when trying to conceive, alongside inositol for those with PMOS / PCOS.

Can PMOS / PCOS affect fertility?

Yes. PCOS, now referred to as PMOS following the 2026 terminology update, can disrupt ovulation and hormone balance, which is why cycles are often irregular. Nutrition, blood sugar balance and appropriate medical support can play a role in managing it.

Can endometriosis affect fertility?

Yes, endometriosis may affect fertility through inflammation, pain, pelvic changes, or effects on egg quality and implantation. Professional medical assessment is important if endometriosis is suspected.

Can inflammation affect fertility?

Low-grade inflammation may be relevant to fertility, particularly alongside PMOS / PCOS, endometriosis or unexplained fertility concerns, though research in this area is still developing.

When should I speak to a fertility specialist?

Current guidance suggests seeking help after 12 months of trying if you're under 36, or sooner if you're 36 or over, have irregular cycles, a known condition such as PMOS / PCOS or endometriosis, known male fertility concerns, or simply want personalised support.

Where can I download a female fertility guide?

You can download our free Foundations of Female Fertility guide, which covers nutrients, lifestyle foundations and reproductive health factors that may support fertility before conception.

Choice of testing, supplements or treatment always depends on your individual circumstances, history and stage, not a one-size-fits-all list. If you'd like to talk it through, our team offers a free 1:1 fertility product consultation.

Related reading

• How to Improve Egg Quality Naturally
• PMOS Fertility Support
• Endometriosis and Fertility
• Getting Pregnant Faster webinar

Medical disclaimer: this article is for general information and does not replace personal advice from a GP, midwife, fertility clinic or qualified healthcare practitioner, especially if you are pregnant, breastfeeding, taking medication or undergoing fertility treatment.

Sources: NICE, Fertility problems: assessment and treatment (NG257); Endometriosis UK, Facts and Figures; NHS/Royal Berkshire NHS Foundation Trust, PCOS patient information.