Lifestyle factors affecting egg and sperm quality shape the environment in which eggs mature, sperm develop, implantation occurs, and early pregnancy is supported. Lifestyle factors influence hormonal signalling, oxidative stress, immune load, and how effectively the body can prioritise reproduction alongside other demands.

Eggs and sperm develop over time, drawing on available resources while responding to signals from the nervous system, endocrine system, and immune system. Here we will explore the key lifestyle factors that influence egg and sperm quality and how these factors interact with underlying nutritional support.

Lifestyle factors affecting egg and sperm quality

Physical and psychological stress increase the body’s overall metabolic demand. When stress is sustained, resources are redirected toward short-term survival processes rather than reproduction.

Elevated stress hormones influence ovarian signalling, follicle development, sperm production, and testosterone regulation. Stress also increases oxidative stress and inflammatory activity, raising nutrient demand throughout the body. When this pattern is ongoing, fewer resources may be available to support egg maturation or sperm development, even when dietary intake appears sufficient.

Over time, sustained physiological stress has been associated with reduced egg quality, impaired sperm parameters, delayed conception, and poorer response to fertility treatment.

Sleep and circadian regulation

Sleep plays a central role in coordinating hormonal rhythms involved in reproduction. This includes hormones that influence ovulation, luteal function, testosterone production, sperm maturation, and cellular repair.

Disrupted or insufficient sleep alters circadian signalling, increases cortisol, and raises oxidative stress. Repair and detoxification processes that normally occur during sleep may be compromised, affecting the internal environment in which eggs and sperm develop.

When sleep disruption is chronic, reproductive cells may be exposed to a less stable physiological environment, which can influence egg quality, sperm integrity, and overall fertility potential.

Inflammation and immune load

Low-grade inflammation increases nutrient demand and oxidative stress throughout the body. Sources of inflammatory load include illness, injury, metabolic strain, gut imbalance, autoimmune activity, and chronic immune activation.

When inflammatory demand is high, resources are diverted toward immune defence and tissue repair. This reduces the availability of nutrients and protective mechanisms needed to support egg and sperm development. Inflammatory signalling can also interfere with ovarian function, sperm production, and implantation processes.

Persistent inflammation has been associated with reduced fertility, poorer embryo development, and increased risk of implantation failure and miscarriage, often in the absence of clear or adequate clinical testing to identify it.

Endocrine-disrupting chemicals and reproductive signalling

Endocrine-disrupting chemicals (EDCs) interfere with hormonal signalling rather than acting as direct toxins. They can mimic, block, or alter the action of natural hormones, affecting how hormonal signals are received, processed, and cleared.

Common sources include plastics, food packaging, pesticides, personal-care products, household cleaners, and environmental pollutants. Exposure increases detoxification demand and oxidative stress, while also disrupting the hormonal signals that guide egg maturation, sperm production, and timing of reproductive processes.

Over time, endocrine disruption has been linked with altered ovarian function, impaired sperm quality, disrupted implantation, and changes to reproductive outcomes, even when nutritional intake is otherwise adequate.

Smoking, vaping, and long-term offspring health

Smoking and vaping introduce compounds that directly increase oxidative stress and damage cellular structures. In sperm, these exposures have been linked to reduced motility, altered morphology, and increased DNA damage. In eggs, they influence the cellular environment responsible for maintaining and protecting genetic material.

Importantly, the impact of smoking and vaping is not limited to conception alone. Changes to egg and sperm integrity associated with these exposures have been linked to long-term health consequences for offspring, reflecting alterations in the biological information passed forward at conception. This includes increased vulnerability during early development and potential effects that extend beyond pregnancy itself.

The microbiome and reproductive cell health

The microbiome plays a central role in shaping inflammation, immune regulation, and hormone metabolism — all of which influence egg and sperm quality. Gut microbes are involved in how nutrients are absorbed, how hormones are processed and cleared, and how inflammatory signals are regulated across the body.

The microbiome can be disrupted by antibiotic use, as well as by dietary patterns high in ultra-processed foods and added sugars. These exposures can reduce microbial diversity and increase inflammatory signalling, even when overall calorie intake or nutrient intake appears sufficient.

When the microbiome is disrupted, nutrient availability may be reduced and inflammatory load increased. This alters the environment in which eggs and sperm develop, increasing vulnerability during maturation and reducing resilience at key stages of reproduction.

The microbiome also influences the implantation environment, shaping immune tolerance, inflammatory balance, and hormone metabolism within the uterus. Disruption in these pathways has been linked with recurrent implantation failure and early pregnancy loss, even when embryo quality appears adequate and standard testing shows no clear explanation.

Supporting egg and sperm quality therefore involves not only nutritional intake, but the microbial environment that governs how nutrients and hormonal signals are processed and utilised within the body.

Physical load and recovery balance

Movement supports metabolic health, circulation, and hormonal balance. However, excessive or poorly matched physical load increases energy demand, inflammation, and oxidative stress.

When physical stress consistently exceeds recovery capacity, resources may be prioritised away from reproduction. This can influence follicle development, ovulatory signalling, sperm production, and the stability of reproductive hormones.

The balance between physical activity and recovery plays a role in maintaining a physiological environment that supports reproductive cell development over time.

Egg and sperm quality reflect the combined influence of nutrition and the wider physiological context in which reproductive cells develop. Lifestyle factors shape hormonal signalling, inflammatory load, oxidative stress, and how nutrients are allocated within the body. Supporting fertility therefore requires not only adequate nourishment, but an internal environment that allows reproductive processes to be maintained and protected over time — with implications that extend beyond conception into pregnancy and the long-term health of offspring.

For those preparing for IVF, these factors become especially relevant, as stimulation, medications, and laboratory fertilisation do not remove the influence of oxidative stress, inflammation, endocrine signalling, or the implantation environment.

Food serves two biological purposes.

It provides fuel — the energy required to keep the body functioning.

And it provides nourishment — the physical materials the body uses to build hormones, mature eggs, support ovulation, prepare the uterine lining, and sustain early pregnancy.

Fertility depends on both. But it is limited far more often by nourishment than by energy alone.

This distinction is often the missing piece for people who have optimised intake, timing, and control — and still find that ovulation or conception does not follow.

Fuel keeps the system running — nourishment builds life

Fuel allows the body to meet immediate demands such as movement, temperature regulation, and basic metabolic function.

Nourishment does something different. It supplies the specific nutrients required to construct reproductive tissue and regulate hormonal pathways.

Egg development, hormone synthesis, endometrial preparation, immune tolerance, and early placental signalling all depend on the ongoing availability of amino acids, fatty acids, vitamins, minerals, and micronutrients.

These processes cannot be powered into existence by calories alone.

Why fertility cannot be solved with calorie logic

Calories describe energy quantity. They do not describe nutrient density, balance, bioavailability, or utilisation.

A person can eat regularly, maintain weight, or carefully manage intake and still fall short of the nutrients required for ovulation and hormonal coordination.

This is why fertility does not reliably improve when food is treated as a numerical target. Reproduction is not an output of energy balance — it is a construction process.

Nourishment depends on what food is made of

Not all foods supply nourishment in the same way.

Highly processed and ultra-processed foods can deliver energy efficiently while providing relatively little of the micronutrient density required for reproductive work.

Even when fortified, these foods are often structurally altered in ways that affect digestion, absorption, insulin response, and downstream nutrient delivery.

By contrast, whole and minimally processed foods tend to provide nutrients in forms the body recognises and can use repeatedly, reliably, and predictably.

From a fertility perspective, this distinction matters far more than calorie totals.

Insulin sensitivity links nourishment to ovulation

Insulin sensitivity is one of the key bridges between food and fertility.

Insulin helps regulate how nutrients are taken up, stored, and delivered to tissues — including the ovaries.

When insulin signalling is stable, nutrients can be transported and utilised effectively. When it is disrupted, nourishment may be present in the diet but unavailable where it is needed.

This is why patterns such as meal skipping, compressed eating, or reliance on highly processed foods can undermine fertility even without obvious under-eating — particularly in PCOS, where insulin sensitivity is often already challenged.

When cycles continue but ovulation doesn’t

A common expression of inadequate or poorly utilised nourishment is the presence of cycles without reliable ovulation.

Anovulatory cycles reflect hormonal activity without completion: the body maintains baseline function but withholds the final step. Read: Anovulatory Cycles: When Periods Arrive but Ovulation Doesn’t.

This is not dysfunction. It is prioritisation.

How this connects to high AMH and tracking confusion

High AMH often reflects ovarian potential — follicles are present and hormonally active.

But potential requires resources. Without sufficient, accessible nourishment, that potential may not translate into ovulation. Read: High AMH and Fertility: What It Signals — and What It Doesn’t.

This also helps explain why ovulation predictor kits can produce repeated or confusing signals without egg release. Read: When Ovulation Predictor Kits Don’t Work — and Why That Matters.

Why this reframes fertility nutrition

Fertility rarely stalls because people are careless with food.

It stalls when food is asked to provide energy efficiently while quietly being required to supply the materials for creating life.

When nourishment is restored as a central principle, fertility nutrition shifts away from control and toward provision.

Next step

If you’ve been focusing on intake, optimisation, or food quality without seeing ovulation respond, this often means nourishment needs to be interpreted rather than further restricted.

The Fertility Focus Hour is a one-to-one session where we look at how your body is receiving and using nourishment — including insulin sensitivity and food quality — and what may be limiting ovulation right now.

Next in this series:
• High AMH and Fertility: What It Signals — and What It Doesn’t
• When Ovulation Predictor Kits Don’t Work — and Why That Matters
• Anovulatory cycles: When Periods Arrive but Ovulation Doesn’t

Ovulation predictor kits (OPKs) are often presented as a reliable way to identify fertile days. For some people, they work as expected. For many others — particularly those with PCOS — they create more confusion than clarity.

If you’ve used OPKs consistently, including more advanced versions, and still feel unsure whether ovulation is actually happening, this is not a failure on your part. It reflects a mismatch between what OPKs measure and how ovulation is regulated in your body.

What ovulation predictor kits are designed to detect

Traditional OPKs detect a surge in luteinising hormone (LH) in the urine. Newer, more advanced kits may also track oestrogen patterns, and in some cases attempt to confirm ovulation retrospectively using progesterone markers.

These tools are designed to identify hormonal changes associated with ovulation. What they do not do is guarantee that ovulation has occurred or will occur in every cycle.

This distinction matters when hormone patterns are prolonged, overlapping, or poorly coordinated.

Why OPKs are unreliable in PCOS

In PCOS, hormonal signals can behave differently. LH levels may be elevated at baseline, oestrogen may rise and fall without triggering ovulation, and progesterone confirmation may not follow even when earlier signals appear promising.

This can lead to repeated positive results, extended “fertile windows,” or cycles where multiple hormones appear active without a completed ovulatory event.

OPK confusion is frequently linked to anovulatory cycles, where hormonal activity occurs without ovulation taking place. Read: Anovulatory Cycles: When Periods Arrive but Ovulation Doesn’t.

When more data doesn’t bring more clarity

For many people, upgrading to a more sophisticated OPK feels like the logical next step. When results still don’t align with lived experience, the sense of frustration can deepen.

This doesn’t mean the technology is flawed. It means the body’s signalling pattern does not fit neatly into predictive models designed around consistently ovulatory cycles.

This pattern is especially common in people with high AMH, where hormone production may be active without being well coordinated. Read: High AMH and Fertility: What It Signals — and What It Doesn’t.

Where cravings often appear

Alongside inconsistent or confusing OPK results, many people notice appetite signals that feel poorly timed, intense, or difficult to interpret — particularly in longer or irregular cycles.

These cravings are not a lack of control. They are a form of feedback the body often uses when internal signals are inconsistent.

Why ovulation is more than tracked hormones

Ovulation is a responsive event. It depends on coordination between the brain, ovaries, and the wider metabolic environment.

How the body interprets food as both fuel and nourishment influences whether hormonal signals are acted on or held back. Read: Food as Fuel and Nourishment: Why Fertility Needs Both.

When conditions are not fully supportive, the body may generate multiple signals without completing the ovulatory process.

Why this matters

If OPKs are assumed to confirm ovulation, people can spend months timing intercourse around signals that don’t reliably lead to egg release.

Understanding the limits of both basic and advanced OPKs allows attention to shift from chasing data to understanding what ovulation requires in the first place.

Next step

If ovulation predictor kits — including advanced or multi-hormone versions — have left you more confused than informed, the issue is often not effort or tracking, but interpretation.

The Fertility Focus Hour is a one-to-one session where we look at ovulation patterns, tracking results, and hormonal context together, so you can understand what your body is responding to — and why.

Next in this series:

• Anovulatory cycles: When Periods Arrive but Ovulation Doesn’t
• High AMH and Fertility: What It Signals — and What It Doesn’t
• Food as Fuel and Nourishment: Why Fertility Needs Both

Anti-Müllerian Hormone (AMH) is often presented as a simple fertility marker: higher is better, lower is worse. For many people, being told they have “high AMH” sounds reassuring — even promising.

But AMH does not measure fertility in the way it is often assumed to. It describes ovarian activity, not ovulatory success. Understanding what high AMH actually signals — and what it doesn’t — can remove a great deal of confusion, particularly for people with PCOS.

What AMH actually measures

AMH is produced by small, developing follicles in the ovaries. Higher levels generally reflect a greater number of follicles in early stages of development.

This tells us something about ovarian activity and potential, but it does not tell us whether ovulation is occurring, how regularly it happens, or whether the wider hormonal environment is supporting it.

In other words, AMH describes quantity and signalling capacity — not outcome.

Why high AMH can coexist with ovulation difficulties

High AMH commonly appears in people who experience regular bleeding but still have anovulatory cycles. Ovarian activity may be present, yet the final step of ovulation does not reliably occur.

This is why high AMH can sit alongside long cycles, irregular ovulation, or cycles where ovulation is assumed rather than confirmed. Read: Anovulatory Cycles: When Periods Arrive but Ovulation Doesn’t.

High AMH does not cause ovulation problems, but it often reflects a pattern where signalling is active without being well coordinated.

When test results don’t translate into clarity

For many people, high AMH results are paired with tracking tools in an attempt to “make sense” of the cycle. Ovulation predictor kits may show repeated surges, unclear patterns, or results that don’t match lived experience.

When AMH is elevated, ovulation predictor kits can detect hormonal activity without reliably identifying true ovulation. Read: When Ovulation Predictor Kits Don’t Work — and Why That Matters.

This disconnect can leave people feeling as though their body is sending mixed messages, even when they are doing everything they’ve been advised to do.

Where cravings often enter the picture

Alongside confusing test results, many people with high AMH notice appetite signals that feel disproportionate, poorly timed, or hard to interpret — particularly when cycles are long or ovulation is inconsistent.

These cravings are not a failure of discipline. They are a form of feedback the body often uses when internal signals are not fully synchronised.

Why metabolic context still matters

Whether ovarian activity translates into ovulation depends on more than the ovaries alone. Ovulation is responsive to the broader metabolic environment, including how the body interprets food as both fuel and nourishment.

When nourishment is sufficient in calories but limited in signalling support, ovarian potential may remain unrealised. Read: Food as Fuel and Nourishment: Why Fertility Needs Both.

What high AMH does — and doesn’t — tell you

High AMH tells us that follicles are present and active. It does not confirm ovulation, predict cycle regularity, or explain why conception has not occurred.

Interpreted in isolation, it can falsely reassure or misdirect attention away from the conditions ovulation requires.

Interpreted in context, it becomes one useful piece of a much larger picture.

Next step

If you’ve been told your AMH is “high” or “reassuring,” yet ovulation or conception hasn’t followed, this mismatch deserves closer interpretation.

The Fertility Focus Hour is a one-to-one session where we look at what high AMH is signalling in your body, and what may be preventing that potential from translating into ovulation right now.

Next in this series:

• Anovulatory cycles: When Periods Arrive but Ovulation Doesn’t
• When Ovulation Predictor Kits Don’t Work — and Why That Matters
• Food as Fuel and Nourishment: Why Fertility Needs Both

Many people assume that if a period arrives regularly, ovulation must be happening. It’s a reasonable assumption — and a very common one. But physiologically, bleeding and ovulation are not the same event.

An anovulatory cycle is a cycle where bleeding occurs, but ovulation does not. This distinction matters because ovulation is the event fertility depends on, not the bleed that follows it.

Understanding this difference often brings clarity to long-standing confusion, especially for people who have been told that their cycle looks “normal” while pregnancy remains elusive.

Bleeding does not confirm ovulation

A menstrual bleed can occur whenever the uterine lining sheds. That shedding does not require an egg to have been released.

In ovulatory cycles, ovulation triggers progesterone production, which stabilises the uterine lining. When progesterone later falls, a true menstrual period occurs. In anovulatory cycles, bleeding may happen because oestrogen levels fluctuate or drop — not because ovulation has taken place.

This is why cycles can appear regular on a calendar while ovulation is inconsistent, delayed, or absent.

Why anovulatory cycles are common in PCOS

Anovulatory cycles are especially common in people with PCOS, though they are not exclusive to it. In PCOS, the ovaries may be active — developing follicles and producing hormones — without completing the final step of ovulation.

This pattern explains why cycles can look busy hormonally but remain functionally incomplete.

Anovulatory cycles are often seen alongside high AMH, where ovarian activity is present but coordination and timing remain disrupted. Read: High AMH and Fertility: What It Signals — and What It Doesn’t.

For many people, one of the earliest signs that ovulation is not being consistently supported isn’t cycle length or test results — it’s appetite signals that feel confusing, intense, or poorly timed. These cravings are not a failure of willpower. They are a form of feedback the body often uses when internal signals are inconsistent.

When ovulation tracking creates more confusion

Many people try to confirm ovulation using ovulation predictor kits (OPKs). When these tests repeatedly fail to give clear answers, it can feel frustrating or even invalidating.

This is also why ovulation predictor kits can repeatedly fail in people who appear to be cycling but are not ovulating consistently. Read: When Ovulation Predictor Kits Don’t Work — and Why That Matters.

OPKs measure hormonal surges, not ovulation itself. In anovulatory cycles, hormone levels may rise and fall without triggering the release of an egg, leading to unclear or misleading results.

The role of metabolic signalling

Ovulation is a responsive event. It depends on signals from the brain, ovaries, and wider metabolic environment aligning at the right time.

Underlying metabolic signals — including how the body interprets food as both fuel and nourishment — play a role in whether ovulation is initiated or delayed. Read: Food as Fuel and Nourishment: Why Fertility Needs Both.

When these signals are inconsistent, the body may prioritise safety over reproduction, even if periods continue to arrive.

Why this distinction matters

If ovulation is assumed rather than confirmed, people can spend months — sometimes years — waiting for something that isn’t actually happening.

Recognising anovulatory cycles does not mean something is “wrong” with your body. It means the body is responding logically to the information it’s receiving.

Clarity here allows the focus to shift from timing intercourse or chasing ovulation dates to understanding what conditions ovulation requires in the first place.

Next step

If you’re having regular bleeds but ovulation remains unclear or inconsistent, this is often where progress stalls — not because you’re missing timing, but because ovulation itself hasn’t been confirmed.

The Fertility Focus Hour is designed to help you understand whether ovulation is actually happening, and what may be influencing it in your body right now.

Next in this series:
• High AMH and Fertility: What It Signals — and What It Doesn’t
• When Ovulation Predictor Kits Don’t Work — and Why That Matters
• Food as Fuel and Nourishment: Why Fertility Needs Both

Ovulation is often described as a single moment — an egg released, a window opened, a chance taken.

In reality, ovulation reflects how effectively your brain, ovaries, and wider endocrine and metabolic systems have been communicating across the 90-day fertility window that shapes egg development before ovulation occurs.

Ovulation is the end point of a process that begins much earlier, as a group of follicles start developing under hormonal signalling. One follicle is selected and continues maturing as the others regress. The quality of that maturation determines whether the egg released at ovulation is capable of fertilisation.

It is not something the body performs on command. It is something the body allows when conditions are in place.

Why Ovulation Kits Often Fail

Ovulation predictor kits detect a hormone surge, but that signal does not reflect the quality of egg development shaped across the 90-day fertility window.

In PCOS, luteinising hormone (LH) may remain elevated across the menstrual cycle, producing false positives or prolonged “high” readings. Under sustained stress, cortisol can disrupt reproductive hormone signalling and make ovulatory patterns less predictable. After fertility treatment, miscarriage, or long periods of cycle disruption, ovulatory patterns may shift or become less predictable.

Ovulation kits detect a hormone signal — not egg quality or endometrial readiness.

When ovulation becomes something to chase or catch, anxiety often rises. That stress response can itself disrupt the very physiology ovulation depends on.

For people with conditions such as PCOS, reliance on kits can create confusion rather than clarity.

“I’m Ovulating — So Why Am I Not Pregnant?”

Ovulation alone does not indicate fertility potential.

An egg can be released without having developed optimally. Hormonal support after ovulation can be shortened or disrupted. Inflammatory or immune factors can interfere with implantation even when ovulation is regular and well-timed.

This is why many people with consistent ovulation still experience difficulty conceiving — and why ovulation is not a reliable standalone marker of fertility.

This pattern is especially common in cases described as unexplained infertility, where ovulation is present but pregnancy does not follow.

The 90-Day Fertility Window

The egg released this month did not begin developing this month.

Egg and sperm development are shaped across approximately 90 days before conception. During this time, they are influenced by metabolic health, inflammatory load, oxidative stress, nutrient availability, and hormonal signalling.

The follicles that will go on to ovulate are already responding to these conditions well in advance of the menstrual cycle in which ovulation occurs.

The body is always responding to what came before.

Effective ovulation support looks upstream — not just at timing, but at the conditions shaping follicle development and egg maturation before ovulation is triggered.

The Fertility Trifecta

Ovulation is one component of fertility — not a measure of whether pregnancy will happen.

Successful pregnancy requires alignment between three independent but interrelated factors:

Egg quality and developmental competence
Sperm quality and DNA integrity
A receptive, appropriately timed uterine environment

Ovulation can occur regularly while one or more of these other conditions is sub-optimal.

This is why ovulation alone cannot predict fertility outcomes — and why timing intercourse around ovulation alone does not reliably resolve conception difficulties.

Why Supplements Can’t Override Physiology

No supplement can override chronic blood sugar dysregulation, sustained stress signalling, unresolved inflammation, inadequate energy intake, or disrupted circadian rhythm.

When supplements are used as the primary intervention, ovulation may still occur — but often without the underlying developmental progression required to support fertilisation and implantation.

At Now Baby supplements sit within a broader framework of essential nutrition, not as standalone solutions.

When Ovulation Support Actually Helps

Ovulation support is most effective when it improves the conditions ovulation responds to.

This includes stabilising blood sugar, reducing inflammatory load, supporting thyroid and adrenal balance, improving cellular energy availability, and aligning nutrition with recovery and circadian rhythm.

When these foundations are in place, follicle development progresses more effectively, and ovulation reflects that progression — not just the release of an egg.

If You’re Ovulating but Not Conceiving

If ovulation is present but pregnancy has not followed, ovulation is not the limiting factor.

The more useful question is what else may still need support within the fertility trifecta.

Ovulation does not operate in isolation.

The Fertility Focus Hour is designed to interpret your cycle in that wider physiological context — so what your body is doing can be understood accurately, rather than inferred from a single signal.

Optimizing IVF success begins long before egg collection. While clinics focus on stimulation, retrieval and transfer, the biology behind egg quality, sperm health, embryo development and implantation starts much earlier. Understanding the normal IVF attrition funnel — and the factors that influence it — helps you move through your cycle with clarity rather than shock, self-blame or confusion.

IVF today

According to the European Society for Human Reproduction and Embryology (ESHRE), the average IVF success rate is 36%, falling to approximately 5% after age 40. These percentages reflect a clinical pathway that focuses mainly on medical protocols – stimulation, retrieval, fertilisation, transfer – but rarely on the environment that eggs, sperm, and implantation actually depend on.

IVF may be recommended because of PCOS, morphology concerns, diminished ovarian response, recurrent pregnancy loss, unexplained infertility (around 25% of cases), or for structural reasons including same-sex couples and those missing reproductive organs. No matter how you arrived here – GP referral, fertility hub, or self-referral – your clinic will guide the medical steps. What they cannot offer is the holistic metabolic preparation that significantly influences success.

Why preparation matters

In nature, an egg takes ~90 days to mature. In IVF, the ovaries are hyper-stimulated and multiple follicles are collected after less than one month. Some of these follicles were never given the metabolic time or environment they needed to develop healthily.

The same is true for sperm. Although production happens daily, sperm only reach fertilising maturity after ~74 days. Every semen analysis reflects a single snapshot — not the true potential of the next 74‑day cohort.

We also know:

• A Mediterranean-style diet has been shown to increase IVF success by 40%
• Endocrine-disrupting chemicals alter egg competence and sperm DNA integrity
• Smoking and high-intensity stress impair mitochondrial function
• Obesity, blood sugar, and inflammation directly affect stimulation response and implantation

Your clinic manages the protocol.

You influence the biology the protocol depends on.

IVF is an event you can prepare for

If you had an event that would affect the rest of your life and cost thousands, you would prepare for it. IVF works in the same way: preparing your internal environment supports the cycle you are about to undergo.

Preparation does not replace IVF — it strengthens egg quality, sperm health, hormones, and implantation conditions so the medical protocol can do its job. This applies equally to IVF, ICSI, IUI, and FET.

Many couples I work with were never told that these physiological foundations matter, or that meaningful improvements are possible within a short window.

What I see every day

Many couples arrive in IVF clinics because that is the medical model:

GP → Specialist → Medical solution.

Most doctors receive minimal training in nutrition and metabolic health, and are rarely in a position to guide the shifts that optimise success. As a result, people often move into IVF earlier than necessary — or repeat cycles without ever supporting the underlying biology.

I have supported people through:

• IVF cycles that previously did not progress in other clinics
• FET cycles following recurrent loss
• Donor egg journeys where couples wanted the strongest possible implantation environment
• HSE-supported IVF, NHS cycles, and private clinic protocols
• Natural conceptions after previously needing IVF — only when appropriate and aligned with physiology

The common thread is this:

When the body is supported, the whole pathway changes.

Your next step: The IVF Preparation Programme

A 30-day, deeply supportive protocol designed to elevate your IVF readiness — physiologically and emotionally.

Includes:

• 90-minute online joint consultation via video call
• Four-week IVF-specific nutrition and lifestyle plan
• Four-week batch-friendly meal plan tailored for stimulation
• 2-week wait meal plan
• A grounded, embodied rhythm to support calmness, clarity, and resilience throughout the process

A container of preparation so you enter your cycle feeling supported, nourished, and ready.

If you are preparing for IVF — or repeating a cycle — this programme is for you.

Whether this is your first cycle, a frozen embryo transfer, or a repeat round after heartbreak… you do not need to walk into it unprepared.

 Learn more about the IVF Preparation Programme

The IVF Attrition Funnel

Why the numbers fall at every step — and why it’s not your fault

One of the biggest shocks in IVF is how many eggs and embryos are lost along the way. Patients rarely see the normal, expected attrition that happens between each stage.

This is what the science shows across ESHRE, ASRM and HFEA‑aligned data.

1. Follicles → Retrieved Eggs

During stimulation, your scan might show a good number of follicles — but not every follicle contains a retrievable egg.

Clinically typical:

60–80% of follicles yield an egg

If 12 follicles are visible, you might reasonably expect 7–10 eggs.

2. Retrieved Eggs → Mature Eggs (MII)

Not every retrieved egg is mature enough to be fertilised.

Clinically typical:

70–85% of retrieved eggs are mature (MII) – possibly 7 eggs.

This is influenced by trigger timing, hormonal response, inflammation and metabolic environment.

3. Mature Eggs → Fertilised Embryos (2PN)

Even when eggs are mature, fertilisation is not guaranteed.

Clinically typical:

60–75% of mature eggs fertilise normally – possibly 5 embryos

This depends on sperm DNA integrity, egg competence, fertilisation method, and lab conditions.

Fertilised Embryos → Blastocysts (Day 5/6)

The biggest drop-off — and the most shocking for patients.

Clinically typical:

30–50% of fertilised embryos reach the blastocyst stage ~ 2

Age has a strong influence.

Why this attrition happens

At each stage, the embryo must meet specific developmental milestones:

• competent egg development
• complete and timely maturation
• healthy sperm DNA and motility
• correct fertilisation
• sufficient mitochondrial energy
• chromosomal normality
• supportive culture conditions
• receptive uterine environment

These are biological processes — not indicators of personal failure.

What this means for IVF preparation

Because numbers drop at every stage, improving your starting point can influence the entire cycle:

• Better egg quality = higher proportion of mature eggs
• Better sperm quality = higher fertilisation rates
• Optimised metabolic environment = improved embryo development
• Lower inflammation & steadier hormones = better stimulation response
• Improved mitochondrial function = stronger blastocyst development

Your clinic manages the protocol.

You influence the biology the protocol depends on.

The IVF Preparation Programme strengthens the foundations your clinic cannot see — the internal environment eggs, sperm, embryos and implantation rely on.

Why Calorie Restriction Doesn’t Work for PCOS Weight Loss

Yes, it’s an unpopular opinion — but calorie restriction is not the answer to PCOS weight loss.

At Now Baby, I see many women facing this challenge. Around 1 in 6 couples experience fertility difficulties, and about 15% of menstruators have some degree of polycystic ovary syndrome (PCOS). Far too often, they’ve been told to “just lose some weight” — without guidance on how to do it safely or effectively.

You deserve better.

If you’re trying to conceive, you need compassionate, evidence-based support that nurtures your hormones, metabolism, and fertility together — not one that works against them.

Understanding PCOS and Fertility Challenges

PCOS is a complex hormonal and metabolic condition. It affects ovulation, insulin sensitivity, and fat storage — all of which influence your ability to conceive. Understanding these links helps you take targeted action rather than relying on calorie restriction alone.

Why Calorie Restriction Fails for PCOS

Calorie restriction can lead to weight loss if excess intake is the main issue. But PCOS is different. It’s primarily a metabolic disorder driven by insulin resistance, which changes how your body handles food and energy.

The Role of Insulin Resistance

When you’re insulin-resistant, your body produces more insulin than normal after eating. Insulin is a fat-storage hormone, so higher levels make it harder to lose weight — particularly around the middle. This central fat increases oestrogen production, creating oestrogen dominance and disrupting ovulation.

The Cortisol Connection

Severe calorie restriction triggers stress in the body, increasing cortisol — another fat-storage hormone. Elevated cortisol leads to stubborn weight, mood changes, and disrupted cycles. For women with PCOS, this means strict dieting can actually worsen symptoms.

A Better Way: Nourish, Don’t Deprive

True progress comes from balancing blood sugar, supporting insulin sensitivity, and nourishing your hormones. Food isn’t just fuel — it’s information that tells your body how to function. The right nutrients improve egg quality, hormone balance, cervical mucus, and your ability to implant and sustain pregnancy.

The Now Baby Approach to PCOS Weight Loss

If you’re ready to stop calorie counting and start nourishing your fertility, the Now Baby 12-Week Fertility Meal Plan is designed for exactly that.

• Stabilise blood sugar and reduce cravings
• Improve insulin sensitivity
• Support egg quality and hormone balance
• Lose belly fat naturally — without tracking calories

Every recipe uses real, whole food and includes batch-cooking options to make it practical for daily life. You’ll feel lighter, clearer, and more energised — while your fertility benefits from the inside out.

You Haven’t Failed — You’ve Been Misinformed

If you’re wondering why no one told you this before, remember: most fertility professionals aren’t nutrition specialists. They can’t teach what they don’t know.

Because PCOS increases the risk of miscarriage and gestational diabetes, taking the time to restore metabolic balance before conception is the smartest, kindest choice you can make. Let’s aim not just for pregnancy, but for a healthy, sustained one.

PCOS and Fertility: Understanding and Managing a Complex Condition

Poly cystic ovaries (PCO)and Poly Cystic Ovarian Syndrome (PCOS) are conditions affecting people with ovaries during their reproductive years.

While these conditions are known for their affect on menstrual cycles, they originate as metabolic disorders affecting insulin sensitivity, which spills into menstruation due to it’s impact on oestrogen.

PCOS is a multifaceted condition, and your experience with it is unique. In this article, we will explore the causes, symptoms, diagnosis methods, the spectrum of PCOS experiences from lean to mean, its impact on fertility and pregnancy, and how to manage PCOS naturally. We’ll also discuss why the birth control pill isn’t a one-size-fits-all solution.

What Causes PCOS? (Genetic, Hormonal & Environmental Factors)

Polycystic Ovary Syndrome (PCOS) is a complex condition with a variety of contributing factors:

• Genetic Factors: There is evidence that PCOS can run in families. If your mother or sister has PCOS, you may be at a higher risk.
• Hormonal Imbalances: PCOS is characterized by an excess of androgens (male hormones) in the body, which can lead to irregular menstrual cycles and other symptoms.
• Insulin Resistance: Many women with PCOS have insulin resistance, a condition where the body’s cells don’t respond effectively to insulin. This can lead to elevated insulin levels and increased androgen production.
• Environmental Factors: Exposure to certain environmental pollutants and endocrine-disrupting chemicals may also play a role in the development of PCOS.

Common PCOS Symptoms and Their Impact

PCOS can manifest in various ways, and not all women will experience the same symptoms:

• Irregular Menstrual Cycles: Missed periods or unpredictable menstrual cycles are common.
• Anovulatory cycles: Due to oestrogen dominance ovulation may be suppressed.
• Miscarriages: PCOS sufferers may experience a higher rate of miscarriage than average.
• Hirsutism: Excessive hair growth in places like the face, chest, and back.
• Acne and Oily Skin: Increased androgens can lead to acne and oily skin.
• Weight Gain, especially around the middle: Many women with PCOS struggle with weight management.
• Cravings: Poor insulin sensitivity can lead to cravings and binge eating.
• Mood Swings and Depression: Hormonal imbalances can affect mood.
• Hair Loss (Alopecia): Thinning hair or hair loss on the scalp.

How PCOS Is Diagnosed

The Rotterdam criteria, established in 2003 by the Rotterdam Consensus Group, are used in Western medicine to diagnose PCOS and require the presence of at least two out of three of the following features:

1. Oligo-ovulation or anovulation: This refers to irregular or absent menstrual periods, which may manifest as infrequent periods or complete absence of menstruation (amenorrhea).
2. Clinical and/or biochemical signs of hyperandrogenism: Clinical signs include hirsutism (excessive hair growth in a male pattern), acne, or male-pattern balding. Biochemical signs involve elevated levels of androgens, such as testosterone, in the blood.
3. Polycystic ovaries on ultrasound: This criterion is met when an ultrasound examination reveals the presence of polycystic ovaries. Polycystic ovaries typically exhibit multiple small follicles (cysts) in the ovaries.

So you don’t necessarily need to have actual multiple cysts in order to have this condition and not having multiple cysts does not exclude this diagnosis. I like to add the Functional medicine approach of using the LH/FSH ratio from Day 2 blood tests. A typical LH/FSH ratio in women without PCOS is around 1:1. In PCOS, the ratio may be higher, often greater than 2:1.Using this criteria I prefer to factor PCOS in as a possibility rather than rule it out. The women I work with are mostly trying to conceive, so they don’t want to waste time trying things that don’t work so it is best to get to the root of the problem as quickly as possible.

Why Weight Management Is Harder with PCOS

PCOS can affect women of all body types. It’s not solely related to weight. Lean PCO refers to women with a normal or lower body mass index (BMI) who still experience PCO symptoms. This highlights the diversity of the condition.

Frustration with Weight Management:

• Many women with PCOS experience significant challenges when it comes to weight management. The hormonal imbalances associated with PCOS can make it harder to lose weight and easier to gain it.
• Despite their best efforts, including calorie restriction and regular exercise, some individuals may see limited progress or no weight loss at all.

Feeling Misunderstood:

• One of the most significant frustrations for people with PCOS is the feeling of being misunderstood by healthcare providers, friends, and even family members. Some may hear insensitive comments like “just eat less and exercise more” without recognition of the unique challenges posed by PCOS. The weight gain is not always a result of consuming additional calories, but in the body processing insulin ineffectively.
• The struggle to lose weight is often perceived as a lack of willpower, which can be disheartening and isolating.

3. Emotional Impact:

• PCOS can have a profound emotional impact, leading to feelings of frustration, sadness, and even depression. The constant struggle with weight can erode self-esteem and body image.
• The emotional toll of PCOS can affect relationships, work, and daily life.

While the frustration of weight management is significant, it’s vital to remember that PCOS is more than just a weight issue. It’s a complex hormonal condition that affects various aspects of your health, including menstrual cycles, fertility, and metabolism. Embracing a holistic approach to health, one that focuses on overall well-being rather than just weight loss, can empower you.

PCOS and Fertility: What You Can Do

PCOS can complicate the path to fertility due to irregular ovulation. But remember, you’re not alone. There are options such as lifestyle changes, medications, and assisted reproductive technologies to help you realize your dream of parenthood. In fact a large Harvard study found an 84% improvement in anovulatory cycles with simple nutrition and lifestyle changes, reflecting the unique demands of this condition.

PCOS and Pregnancy: Reducing Risks

During pregnancy, women with PCOS may face an increased risk of complications such as gestational diabetes and preeclampsia. Maternal age and obesity can also add to these risks, so ideally whatever can be addressed prior to conception will make for a healthier pregnancy with fewer necessary interventions.

Managing PCOS Naturally with Nutrition & Lifestyle

Taking control of your health naturally is empowering. Consider:

• Diet: A balanced, low glycemic index diet can be beneficial. This may switch off fat storage, reduce cravings and restart ovulation or menstruation.
• Exercise: Regular physical activity helps manage symptoms. Simple walking can improve insulin sensitivity.
• Stress Management: Techniques like yoga, reflexology and meditation can improve well-being.
• Supplements: Inositol supplements may help regulate menstrual cycles, while Vitamin D may improve insulin sensitivity.
• Gut health: A balanced and healthy gut microbiome can aid in regulating hormones and reducing inflammation, both of which are key factors in PCOS. Research suggests that a healthy gut can help improve insulin sensitivity, leading to better blood sugar control. Additionally, a well-functioning gut can support the body in processing and eliminating excess hormones, potentially alleviating some PCOS symptoms. Therefore, focusing on gut health through a balanced diet, probiotics, and lifestyle changes may complement PCOS management strategies and promote overall well-being.

Feeling ready to take control of your hormones?

The Fertility Focus Hour (€97) is designed for women with PCOS who want to understand what’s driving their symptoms and create a clear, personalised plan.

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Xenoestrogens and PCOS: What You Need to Know

Xenoestrogens are synthetic or naturally occurring chemicals that can mimic the effects of estrogen in the body. Exposure to these compounds has raised concerns about their potential impact on hormone-related conditions like PCOS (Polycystic Ovary Syndrome).

Understanding Xenoestrogens and Their Sources: Xenoestrogens, also known as environmental oestrogens, are substances found in the environment that can disrupt the endocrine system by mimicking the actions of oestrogen. They can be natural or synthetic and are commonly found in various products and pollutants, including:

1. Pesticides: Many pesticides used in agriculture contain xenoestrogens, which can end up in the food supply.
2. Plastics: Bisphenol A (BPA) and phthalates, found in some plastics, can leach into food and beverages, especially when exposed to heat.
3. Personal Care Products: Some cosmetics, lotions, and shampoos may contain xenoestrogens, like sodium benzoate, which can be absorbed through the skin.
4. Processed Foods: Some processed foods contain additives and preservatives that may have xenoestrogenic properties.

The Link Between Xenoestrogens and PCOS: While research on the direct relationship between xenoestrogens and PCOS is ongoing, there are several concerns about how exposure to these compounds may contribute to the development or exacerbation of PCOS:

1. Hormonal Imbalance: Xenoestrogens can disrupt the body’s hormonal balance by binding to oestrogen receptors, potentially leading to hormonal imbalances associated with PCOS.
2. Insulin Resistance: Some studies suggest that xenoestrogens may contribute to insulin resistance, a key factor in PCOS development.
3. Ovulatory Dysfunction: Exposure to xenoestrogens may interfere with normal ovulation, exacerbating fertility issues common in PCOS.
4. Inflammation: Xenoestrogens may promote inflammation, which is often observed in women with PCOS.

Reducing Xenoestrogen Exposure: To minimize potential risks associated with xenoestrogens, individuals with PCOS and those at risk should consider taking the following precautions:

1. Choose Organic Foods: Opt for organic produce and meats to reduce exposure to pesticides and hormones commonly used in conventional farming.
2. Avoid Plastics: Use glass or stainless steel containers for food and beverages instead of plastic containers, especially when heating food.
3. Check Product Labels: Read product labels for ingredients like parabens, phthalates, and BPA, and choose products that are free of these substances.
4. Limit Processed Foods: Reduce your intake of heavily processed foods, which may contain additives and preservatives.
5. Support Detoxification: Improving gut health and reducing gut permeability can set up a positive chain reaction.

While the relationship between xenoestrogens and PCOS is an area of ongoing research, taking steps to reduce exposure to these substances can be a proactive approach to managing the condition and supporting your overall health.

Why the Pill Doesn’t Fix PCOS

While birth control pills can provide temporary relief for some PCOS symptoms, they don’t address the underlying causes. The bleed experienced between pill packs is not a period, it is a response to the withdrawal from medication. The Birth Control Pill does not regulate your cycle.

Long-term use may also have side effects that impact your journey, particularly in relation to heart and bone health as well as gut integrity.  It’s essential to explore alternatives tailored to your unique needs and goals.

Ready to start balancing your hormones through food?

The 90-Day Fertility Meal Plan (€47) gives you structured recipes and guidance to stabilise blood sugar, nourish egg health, and restore ovulation.

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From Struggle to Strength

You are not defined by PCOS. With the right support, your hormones, cycles, and fertility can thrive again. Now Baby offers compassionate, evidence-based fertility nutrition and coaching online worldwide.

Explore Support Options ›

When people think about fertility, insulin is rarely the first hormone that comes to mind. Yet insulin plays a quiet but powerful role in shaping the metabolic conditions in which reproductive hormones operate.

As a key metabolic signal, insulin communicates whether the body perceives safety, energy availability, and stability. When insulin signalling is steady, hormones such as oestrogen, progesterone, testosterone and thyroid hormone are more likely to rise and fall in a coordinated, predictable way. When insulin is dysregulated, that coordination can begin to falter long before anything appears abnormal on a standard blood test.

This is why supporting healthy blood sugar regulation is one of the most important — and often overlooked — foundations of fertility. It doesn’t create fertility on its own, but it removes metabolic noise that can quietly interfere with ovulation, implantation, egg and sperm development, and early pregnancy.

What exactly is insulin?

Insulin is a hormone produced in the pancreas. Its primary role is to regulate how the body metabolises carbohydrates, fats and protein by promoting the uptake of glucose into liver and fat cells.

Insulin’s release is controlled by a sensitive feedback loop involving the beta cells of the pancreas.

Beyond its metabolic role, insulin also sits upstream of major reproductive hormones. It influences the production of:

• DHEA → which converts to testosterone and oestrogen
• Pregnenolone → which converts to progesterone

When insulin becomes dysregulated, these downstream hormones can shift out of balance.

What causes dysglycaemia?

Here we are not talking about diabetes, but the far more common everyday imbalance called dysglycaemia — when blood sugars fluctuate outside the ideal range because of diet, sleep, stress or lifestyle patterns.

Blood glucose naturally moves within an upper and lower limit. When levels move outside that range, the body must compensate. Over time, this constant correction can impact fertility.

Common drivers of dysglycaemia include:

Carb / fat / protein balance in meals
Fibre intake
Skipping meals
Eating late at night
Shift work
Pregnancy
Chronic stress
Poor sleep
Caffeine
Artificial sweeteners
Chewing gum
Dehydration
Intensity and timing of exercise

Even small misalignments across the day can create hormonal ripple effects.

5 ways insulin affects fertility

The hormone hierarchy shows how insulin sits above the steroid hormones involved in conception. When insulin is out of balance, these effects can be subclinical — not always visible on blood tests — yet still powerful enough to disrupt baby-making physiology.

Here are five of the most meaningful downstream effects.

Increased adiposity (especially visceral fat)

Excess glucose is first stored in the liver for quick energy use. Once that storage is full, insulin converts additional glucose to fat — particularly visceral fat around the abdomen and internal organs.

This is one reason belly fat can be so resistant to calorie restriction; lowering calories can further dysregulate insulin and make the situation worse.

You do not need to meet the criteria for obesity to have visceral fat. Because body fat can increase oestrogen production, excess visceral fat may contribute to higher oestrogen levels.

Oestrogen dominance

In men, oestrogen should be in balance with testosterone. Too much oestrogen relative to testosterone can reduce sex drive and impair sperm production.

In women, oestrogen dominance can lead to:

• Irregular menstrual cycles
• Failure to ovulate
• Short luteal phases
• Increased risk of early miscarriage

When insulin is dysregulated, it can easily shift this oestrogen–progesterone balance.

Insulin resistance

When blood sugars remain elevated and the liver can no longer store excess glucose, the body may develop insulin resistance. Cells stop responding to insulin’s signal, leaving glucose trapped in the bloodstream.

This leads to:

• Increased insulin production
• Energy crashes
• Intense sugar or carb cravings
• Chronic low-grade inflammation

Inflammation and high circulating insulin can disrupt hormone balance, egg development, ovulation, and sperm integrity — including DNA fragmentation.

Egg and sperm quality

DHEA — a hormone heavily influenced by insulin — plays a vital role in egg growth and quality during the months before ovulation. Lower DHEA levels are often seen in women with diminished ovarian reserve.

Dysglycaemia can also interfere with:

• Testosterone production in men (necessary for sperm generation)
• Progesterone levels in women (low levels can cause anovulation or luteal phase defects)
• Sperm motility and morphology

Even mild insulin dysregulation can quietly weaken egg and sperm potential.

Thyroid function and early pregnancy

Thyroid hormone affects every cell in the body. It regulates energy, temperature, metabolism, menstrual cycles, digestion, mood and fertility.

During early pregnancy, the embryo relies on maternal thyroid hormone for rapid cell division.

Dysglycaemia can disrupt thyroid function, leading to:

• Irregular or heavy cycles
• Anovulatory cycles
• Miscarriage risk
• Fatigue and low mood

Because thyroid function is foundational to conception and early pregnancy, insulin balance becomes essential.

Optimising your fertility by supporting insulin balance

It is rare for me to see a new fertility client without some degree of dysglycaemia — and that gives us a powerful place to begin.

Even when there is a known fertility condition such as low AMH, the fundamentals of blood sugar balance remain relevant. When insulin is steady, the entire reproductive system stabilises.

Inside a Fertility Consultation, we look at your unique patterns — your daily rhythms, stress load, sleep, meal timing, cravings, energy dips, and how these influence your hormonal environment. This is where we begin to piece together what your body is trying to tell you and what needs to shift to support egg and sperm development.

Because nothing in the body works in isolation, we also look gently at the wider landscape: stress physiology, thyroid health, shift-work patterns, and the practical steps that help you feel in control of your fertility again.

When your intention is to optimise your fertility — naturally or ahead of IVF — one of the most impactful places to start is with your plate. And if you’d like personalised guidance, a Fertility Consultation is the clearest next step.