If you have been diagnosed with PCOS and you are hoping to have a baby, you have probably already been handed a great deal of frightening information and not much practical help. You may have been told your cycles are irregular, that you might struggle, possibly that you should lose weight, and then sent away to get on with it.
So let me offer something different: a clear explanation of what is actually happening in your body, what genuinely helps, and what the evidence says about conceiving with PCOS. Because the honest headline is that most women with PCOS do go on to conceive, and there is a great deal you can do to support that.
A note on the name
You may have seen something about this recently. In May 2026, following an international consensus process published in The Lancet, PCOS was formally renamed PMOS, which stands for polyendocrine metabolic ovarian syndrome.
The reasoning is genuinely sound. The old name centred on ovarian cysts, which are not actually cysts at all, they are immature follicles, and which are not even required for a diagnosis. That framing hid the fact that this is a whole-body condition involving insulin, androgens and metabolic health, not simply an ovarian problem. The new name reflects what is really going on.
Both names will be in use for some time, with the formal coding update expected in 2028. I will use PCOS through this article since it is still the term most of us know, but it is worth knowing the change is coming.
What is actually happening in your body
PCOS is diagnosed using what are called the Rotterdam criteria, which require at least two of these three features: irregular or absent ovulation, elevated androgens (either on a blood test or through symptoms like acne and unwanted hair growth), and a particular appearance of the ovaries on ultrasound.
Notice that you can be diagnosed without ever having the ovarian appearance, which is exactly why the old name was so misleading.
Here is the chain of events that matters most for fertility. Many women with PCOS have some degree of insulin resistance, meaning their cells respond less readily to insulin, so the body produces more of it to compensate. This happens regardless of body size; lean women with PCOS can be just as insulin resistant as anyone else.
That excess insulin then does something specific: it stimulates the ovaries to produce more androgens, including testosterone. Elevated androgens interfere with the normal maturation of follicles, so instead of one follicle developing fully and releasing an egg, several start and stall. Ovulation becomes irregular or stops altogether.
This is genuinely good news, once you see it. It means the problem is not usually your ovaries being broken. It is a signalling problem driven substantially by insulin, and insulin is something you can influence.
Why fertility is affected, and why it is not hopeless
The main reason PCOS affects fertility is straightforward: if you ovulate less often, you have fewer opportunities to conceive each year. Someone ovulating monthly has twelve chances. Someone ovulating four times a year has four. That is a real difference, but it is a difference in frequency rather than an inability.
Current evidence suggests women with PCOS generally have good ovarian reserve, often better than average in terms of egg quantity, though there may be some reduction in egg quality related to the metabolic environment. Again, that environment is something you can work on.
Most women with PCOS who want to conceive do so, whether naturally, with lifestyle support, or with medical assistance. The path may take longer and may involve more help, but the outlook is genuinely more hopeful than the internet often suggests.
The single most useful thing you can do
If you take one thing from this article, let it be this: steadying your blood sugar is the foundation of everything else in PCOS.
Because insulin drives androgens, and androgens disrupt ovulation, anything that improves insulin sensitivity works upstream of the whole problem. This is not a fringe idea; it is the mechanism the entire condition runs on.
A landmark study published in the American Journal of Clinical Nutrition found that women with PCOS following a low-glycaemic diet for twelve weeks experienced a sixty-seven per cent improvement in menstrual regularity. That is a substantial change from food alone.
What this looks like practically is not a restrictive diet, and I want to be clear about that, because women with PCOS are told to restrict constantly and it does real harm.
Build every meal around protein, fibre and healthy fat. These slow glucose entry into the bloodstream, which flattens the insulin response. A carbohydrate eaten alone spikes; the same carbohydrate eaten alongside protein and fat does not.
Eat your vegetables before your carbohydrates. Food order genuinely matters, and eating vegetables first, then protein, then carbohydrates last can reduce post-meal glucose spikes by thirty to fifty per cent. You change nothing about what you eat, only the sequence.
Do not skip meals. Long gaps drop blood sugar, which triggers cortisol, which raises blood sugar again and worsens insulin resistance over time. Eating regularly is genuinely part of managing this.
Move after eating. A ten to fifteen minute walk after a meal significantly reduces the post-meal glucose rise, because your muscles use glucose during movement.
Build muscle. Resistance training improves insulin sensitivity meaningfully and lastingly, since muscle is where most glucose is taken up. This matters more than cardio for PCOS specifically.
Supplements worth knowing about
Inositol is the one with the most evidence behind it, and it is worth understanding properly. Inositol is a naturally occurring compound involved in insulin signalling, found in fruits, grains and nuts.
The research is genuinely encouraging. A systematic review informing the 2023 international PCOS guidelines examined thirty trials, and a 2026 umbrella review in Frontiers in Endocrinology pooled thirteen reviews built from randomised controlled trials. On the strongest evidence, women taking inositol were more than twice as likely to ovulate compared with placebo, with lower testosterone and improved pregnancy rates.
Several trials found myo-inositol at four grams daily, combined with folic acid, produced ovulation and pregnancy rates comparable to metformin, with considerably fewer digestive side effects. The commonly used form is myo-inositol and D-chiro-inositol in a forty to one ratio, which mirrors the body’s natural plasma ratio.
That said, researchers are clear the evidence is not fully settled and more robust trials are needed. It is a promising, low-risk option rather than a guaranteed solution. Most people see effects within twelve to twenty-four weeks, so give it three months before judging.
Vitamin D is worth testing, since deficiency is very common in PCOS and supplementation appears to support both insulin sensitivity and follicle development.
CoQ10 supports the mitochondrial function of developing eggs, which is relevant given the egg quality question.
Omega-3 supports the inflammatory picture that often accompanies insulin resistance.
Please do discuss any supplement with your GP, particularly if you are on medication, and treat supplements as support alongside the food and movement foundations rather than instead of them.
The parts nobody mentions
Sleep. Poor sleep worsens insulin resistance measurably, sometimes within days. Sleep apnoea is also more common in PCOS and frequently undiagnosed, so if you snore heavily or wake unrefreshed, that is worth mentioning to your GP.
Stress. Cortisol raises blood sugar directly, which feeds the insulin problem. This is not about relaxing on command, it is about eating regularly, sleeping, and reducing genuine load where you can.
Mental health. Rates of anxiety and depression are meaningfully higher in PCOS, and this is under-recognised. It is not a character weakness or a failure to cope; it is part of the condition’s picture, partly hormonal and partly the sheer weight of managing it. It deserves support in its own right.
The weight conversation. Many women with PCOS are told to lose weight and given nothing else. I want to be careful here. Improving insulin sensitivity does help ovulation, and for some women body composition is part of that. But PCOS makes weight loss genuinely harder, the advice is often delivered without support, and lean women with PCOS have the same underlying insulin problem while being told they are fine. Focus on the behaviours that improve insulin sensitivity, eating pattern, movement, sleep, rather than a number on a scale. The metabolic improvements happen regardless of whether your weight changes much.
Medical options, so you know what exists
If you have been trying for a year, or six months if you are thirty-six or older, or if your cycles are very irregular or absent, please do ask your GP for a referral rather than waiting.
Letrozole is now considered first-line for ovulation induction in PCOS, and evidence shows it produces better live birth rates than clomiphene, which was the older standard. Worth knowing, because some practices still reach for clomiphene first.
Metformin improves insulin sensitivity and can help restore ovulation, particularly where insulin resistance is significant.
Gonadotropins and IVF are options where earlier approaches have not worked, and IVF outcomes in PCOS are generally very good with modern protocols.
None of this means failure. Ovulation induction is a common, effective intervention, and needing it says nothing about you.
Where to start this week
If all of this feels like a lot, start with one thing. Add protein to your breakfast, since a carbohydrate-only breakfast sets up the whole day’s blood sugar pattern. Walk for ten minutes after your evening meal. Get to bed half an hour earlier.
Then track your cycles, so you have real information about whether and when you are ovulating, rather than guessing. Basal body temperature, cervical mucus, or ovulation tests, though be aware that PCOS can produce multiple LH surges, so tests alone can be misleading and pairing them with temperature is more reliable.
Give any change three months before judging it. Follicles take around ninety days to develop, so you are working on cycles you will not see the results of for a while. That is frustrating, and it is also why patience matters so much here.
You are not broken, your body is not failing you, and this is one of the more responsive conditions there is when it comes to the things you can actually influence.
A gentle note
This article is for gentle, supportive education and is not medical advice. If you have PCOS, or suspect you might, please work with your GP or a specialist. If you have been trying to conceive for over a year, or over six months if you are 36 or older, or if your cycles are very irregular or absent, please ask for a referral rather than waiting.
If you would love practical, judgement-free support building this into your real life, I am here. I offer warm, one-to-one fertility and nutrition coaching, with no restriction and no lectures.
Written by
Brydee Thomas
Holistic health coach and founder of Radiant Bloom, supporting women through trying to conceive, pregnancy and the postpartum months. Evidence-based guidance, no programmes and no generic plans.