PCOS and Fertility: What You Need to Know About Getting Pregnant

What Is PCOS and Why Does It Affect Fertility?

PCOS is a hormonal condition that affects approximately 8–13% of women of reproductive age worldwide, making it the most prevalent endocrine disorder in this group.¹ It's characterised by a combination of irregular or absent ovulation, elevated androgen levels (such as testosterone), and the presence of multiple small follicles on the ovaries — what scans sometimes describe as a "polycystic" appearance.

Fertility depends on ovulation: the release of a mature egg from the ovary each cycle. In PCOS, ovulation is often irregular or doesn't happen at all — a state called anovulation. No egg, no fertilisation.

The hormonal picture behind this is complex. Elevated luteinising hormone (LH), insulin resistance, and excess androgens all disrupt the delicate signalling that triggers ovulation. Insulin resistance is particularly important: studies suggest that 50–70% of women with PCOS have some degree of insulin resistance, which amplifies androgen production and further suppresses normal ovulation.²

Can You Get Pregnant With PCOS?

Yes — absolutely. PCOS is associated with subfertility (reduced, not absent, fertility), not infertility in most cases.

Research consistently shows that the majority of women with PCOS who receive appropriate treatment are able to conceive. A large meta-analysis published in Human Reproduction Update found that with ovulation induction, cumulative live birth rates in women with PCOS are comparable to those in women without the condition.³

The key word is treatment. Many women with PCOS won't conceive on a typical monthly cycle without intervention — but with the right combination of lifestyle changes, medication, and monitoring, outcomes are genuinely good.

How PCOS Affects Your Fertility: The Key Mechanisms

Understanding what's happening in your body helps you target the right interventions.

1. Irregular or Absent Ovulation

This is the primary fertility barrier in PCOS. If you're not ovulating, conception isn't possible regardless of other factors. Tracking cycles, basal body temperature, or using ovulation predictor kits can help confirm whether ovulation is occurring — though LH surge tests can give false positives in PCOS due to chronically elevated LH levels.

2. Insulin Resistance

Excess insulin stimulates the ovaries to produce more androgens, which interfere with follicle maturation and ovulation. Improving insulin sensitivity — through diet, exercise, or medication — is often one of the most effective first steps.

3. Hormonal Imbalance

Elevated androgens and LH, combined with low FSH (follicle-stimulating hormone), create an environment that stalls follicle development before a dominant follicle can mature and ovulate.

4. Endometrial Issues

Some research suggests that the hormonal environment in PCOS may affect endometrial receptivity — the lining's ability to accept a fertilised egg — though this remains an area of ongoing study.⁴

Practical Steps to Improve Your Chances

Start With Lifestyle

For women with PCOS and overweight or obesity, even a modest weight reduction of 5–10% of body weight can restore ovulation in some cases.⁵ This isn't about achieving an "ideal" weight — it's about reducing the metabolic load that's driving hormonal disruption.

Diet: A diet that moderates refined carbohydrate intake and prioritises protein, fibre, and healthy fats improves insulin sensitivity and reduces androgen levels. The Mediterranean dietary pattern has the strongest evidence base in PCOS.⁶

Exercise: Regular physical activity — particularly resistance training and moderate aerobic exercise — improves insulin sensitivity independently of weight loss.

Sleep: Poor sleep worsens insulin resistance. If you have symptoms of sleep apnoea (common in PCOS), addressing this can meaningfully improve hormonal markers.

Ovulation Induction Medications

When lifestyle alone isn't sufficient, medications can trigger ovulation:

• Letrozole is now the first-line pharmacological treatment for ovulation induction in PCOS, after landmark trials demonstrated superior live birth rates compared to clomiphene citrate.⁷
• Clomiphene citrate remains widely used and effective, though letrozole has largely superseded it in guidelines.
• Metformin, an insulin-sensitising agent, can restore ovulation in some women and is often used alongside letrozole.

When to See a Specialist

If you've been trying to conceive for 12 months without success (or 6 months if you're over 35), a referral to a fertility specialist is appropriate. A reproductive endocrinologist can assess both partners, confirm ovulation status with monitoring, and discuss assisted reproduction options including IUI or IVF if needed.

What About IVF and PCOS?

Women with PCOS who undergo IVF require careful management. Because of the high number of antral follicles, there is an elevated risk of ovarian hyperstimulation syndrome (OHSS) — an excessive response to stimulation drugs. Modern protocols have significantly reduced this risk through lower stimulation doses, GnRH antagonist protocols, and frozen embryo transfer strategies.⁸

The good news: women with PCOS typically have a strong ovarian reserve (measured by AMH levels), which means they tend to produce good numbers of eggs when stimulated appropriately.

The Mental Load of PCOS and Fertility

Fertility challenges take a toll that goes well beyond the physical. Research documents significantly higher rates of anxiety and depression in women with PCOS, and the uncertainty of irregular cycles compounds the emotional weight of trying to conceive.⁹

Acknowledging this matters. Tracking apps, online communities, and dedicated hormonal health platforms can reduce the sense of navigating this alone — and connecting with practitioners who understand PCOS specifically (rather than general fertility advice) makes a measurable difference to outcomes and wellbeing.

Key Takeaways

• PCOS is a common hormonal condition that affects ovulation, but most women with PCOS can conceive with appropriate support.
• Insulin resistance is a central driver — improving it through lifestyle and/or medication is often the most impactful first step.
• Letrozole is the current first-line medication for ovulation induction in PCOS.
• A weight reduction of 5–10% can restore ovulation in some women.
• IVF is effective for PCOS, though OHSS risk needs careful management.
• Seek specialist input if you haven't conceived after 12 months of trying (6 months if over 35).

Frequently Asked Questions

Can you get pregnant naturally with PCOS? Yes. Many women with PCOS conceive naturally, particularly if their cycles are only mildly irregular. The likelihood depends on whether ovulation is occurring, other fertility factors, and overall metabolic health. Lifestyle changes — particularly improving insulin sensitivity — can restore natural ovulation in some women.

How does PCOS affect egg quality? The evidence is nuanced. PCOS doesn't inherently impair egg quality, but the hormonal environment (elevated LH, androgens) can affect follicle maturation. Optimising metabolic health before attempting conception is thought to improve egg quality outcomes.

What is the best diet for PCOS fertility? A diet that reduces refined carbohydrates, includes adequate protein, and prioritises vegetables, legumes, whole grains, and healthy fats is supported by evidence. The Mediterranean dietary pattern has the most research backing in PCOS. Reducing ultra-processed foods and added sugar is consistently recommended.

Does PCOS affect pregnancy outcomes? Women with PCOS have modestly elevated risks of gestational diabetes, preeclampsia, and preterm birth compared to the general population.¹⁰ These risks are manageable with appropriate antenatal care, and many women with PCOS have uncomplicated pregnancies.

At what age does PCOS fertility decline? PCOS is associated with higher AMH levels and more antral follicles, suggesting a later decline in ovarian reserve compared to women without PCOS. However, age-related fertility decline is universal — PCOS does not make you immune to it. It's still advisable to seek assessment if you're over 35 and have been trying without success for 6 months.

Can metformin help with PCOS fertility? Metformin improves insulin sensitivity and can restore ovulation in some women with PCOS. It's often used as an adjunct to letrozole for ovulation induction. Evidence suggests it may also reduce OHSS risk during IVF stimulation.

Call to Action

Zoey is a hormonal health platform built for women with PCOS.

Whether you're trying to understand your cycle, working on improving your hormonal health before conception, or looking for guidance you can actually act on — Zoey brings together evidence-based tracking, expert content, and personalised insights in one place.

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