PCOS is one of the most common causes of reduced fertility, but it does not mean you cannot get pregnant. Most women with PCOS do have children in the end, sometimes on their own and sometimes with help (Teede et al., 2023). The bottleneck is usually not the egg reserve, but irregular ovulation that makes timing hard.
I notice that a wish to conceive with PCOS brings a lot of uncertainty. You hear conflicting stories, and your cycle gives little to hold on to. Below you read why getting pregnant works differently with PCOS, what you can do yourself and which hormones give a first direction.
Why is getting pregnant harder with PCOS?
In PCOS ovulation often fails to happen or starts irregularly. Without ovulation there is no egg to fertilise, and that lowers your chance per cycle. The fertility itself is usually not gone, but the opportunity comes by less predictably.
An erratic cycle also makes it hard to pin down your fertile days. Many women count on a fixed ovulation around day 14, while in PCOS it can shift strongly or fail to happen at all.
Things that make timing harder with PCOS:
- A cycle that keeps lasting longer than 35 days
- Months without a period while you are not pregnant
- Ovulation that falls at a different moment each month
- Ovulation tests that give a false signal several times because of a high LH
Which hormones say something about your fertility?
No single hormone predicts on its own whether you will conceive, but together a few values give a picture of your cycle and egg reserve. In PCOS you mainly look at AMH, LH and FSH. They show how many follicles there are and whether the signalling from the brain is right.
| What you want to know | Value that gives insight | What it shows |
|---|---|---|
| How many small follicles you have | AMH | Is often raised in PCOS due to many immature follicles |
| Whether the ovulation signalling is right | LH + FSH | A raised LH/FSH ratio often fits PCOS |
A high AMH means something different in PCOS than in women without PCOS. It points to many small follicles, not automatically to better fertility. So always discuss such a result with a doctor.
The Fertility Assessment looks at AMH, FSH and LH among others in one draw. Our separate article goes deeper into which hormones to test for PCOS.
How do you know if you ovulate?
With an irregular cycle, ovulation is hard to confirm with an ovulation test alone. A measurement of your progesterone in the second half of your cycle can show whether an egg was actually released. That gives more certainty than a calendar.
Progesterone only rises after ovulation. A raised value around seven days before your expected period fits an ovulation that has happened. With a very irregular cycle, the right moment is sometimes hard to choose.
The Ovulation Confirmation measures progesterone to check whether you ovulated. For a broader picture around conceiving, also read which blood test is useful when trying to conceive.
What can you do yourself to improve your chances?
Lifestyle is the first step in PCOS that appears in almost every guideline, including around a wish to conceive (Teede et al., 2023). Improving insulin sensitivity in particular seems to make the cycle more regular. A more regular cycle gives more chances of ovulation.
What research suggests can help:
- Regular exercise, with attention to strength and stamina
- Food that keeps your blood sugar steadier, with fewer fast sugars
- A small weight loss, where there is room for it, can restore ovulation
- Attention to sleep and stress, which also influence your cycle
These steps do not replace medical guidance. Some women need medication to start ovulation, for example under the care of a GP or gynaecologist. What suits you is something you discuss together with a doctor.
When does it make sense to seek help?
The usual rule is to contact your GP after a year of trying without result. With PCOS or a very irregular cycle that can be sensible sooner, because ovulation is then often the bottleneck. Looking sooner does not mean immediate treatment, but it does mean clarity faster.
Consider a conversation sooner if you recognise this:
- You are 35 or older and have been trying for half a year
- Your period stays away for months
- You already know you have PCOS or a thyroid problem
- You doubt whether you ovulate at all
A self-test can be a starting point for that conversation, but does not replace it. Want to read the whole picture around PCOS first? Then see our PCOS pillar on symptoms, causes and diagnosis.
Frequently asked questions
Can you conceive spontaneously with PCOS?
Yes, that happens often. Many women with PCOS ovulate now and then and conceive on their own. A more regular cycle improves that chance, and lifestyle plays a part in it.
Does a high AMH mean I am more fertile?
Not in PCOS. A high AMH then points to many small, immature follicles, not automatically to a better chance of pregnancy. The value should always be assessed in the context of your whole picture.
How long should I try before seeking help?
The usual rule is a year, or half a year if you are 35 or older. With an irregular cycle or known PCOS, earlier contact with your GP can be sensible.
References
- Teede HJ, Tay CT, Laven J, et al. International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome 2023. Monash University, ESHRE and ASRM, 2023.
- Bozdag G, Mumusoglu S, Zengin D, Karabulut E, Yildiz BO. The prevalence and phenotypic features of polycystic ovary syndrome: a systematic review and meta-analysis. Hum Reprod. 2016;31(12):2841-2855. PMID: 27664216.
- NHG and Thuisarts.nl. Polycystic ovary syndrome (PCOS) and the wish to conceive. Dutch College of General Practitioners. Available via thuisarts.nl.
Every blood test result through Lunara includes a professional assessment by a BIG-registered doctor. For treatment decisions, discuss your results with your GP.
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