PCOS blood test

Learn if you might have PCOS and monitor this condition with a home blood test. Test arrives in 1-2 days. Results in 48 hours.


Every 3 months

Pause, change, or cancel at any time

Ways to take your sample

Home finger-prick • Nurse - £40

How can a PCOS blood test help you?

Learn if symptoms like irregular periods, acne, difficulty getting pregnant, or excess body hair (hirsutism) might be caused by polycystic ovary syndrome (PCOS). 

This test will check if you have hormonal imbalances — like high testosterone levels. If they're high, and you have either irregular periods or an ultrasound scan confirming polycystic ovaries, PCOS can be diagnosed. PCOS can increase your risk of diabetes, high cholesterol, and thyroid disorders. A PCOS blood test allows you to check this risk.

You should aim to do your PCOS test on day 3 of your period. This is when your reproductive hormone levels are easiest to interpret, giving you the best insights into your cycle.

What's covered in this blood test?

Testosterone (free or unbound)

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A main feature of PCOS can be high testosterone levels. This can lead to symptoms like irregular or absent periods, excessive hair growth on your body, weight gain, acne, and difficulty getting pregnant.

Follicle-stimulating hormone (FSH)

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Follicle-stimulating hormone (FSH) helps your ovaries to function normally and plays a key role in egg production and ovulation. If you have PCOS, you might have a raised LH:FSH ratio.

Luteinising hormone

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Luteinising hormone (LH) plays a key role in reproduction — it helps to regulate your menstrual cycle and peaks just before ovulation, triggering an egg release from the ovary. In PCOS, you might have a raised LH:FSH ratio.

Thyroid profile

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An overactive thyroid or underactive thyroid causes hormonal imbalances — which can lead to symptoms like weight gain, low mood, anxiety, depression, and difficulty sleeping. A thyroid disorder can also sometimes be the cause of issues with your menstrual cycle and fertility.

Vitamin D

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Vitamin D deficiency is common in people with PCOS. Optimal vitamin D levels are linked to improved insulin sensitivity and an improvement in PCOS symptoms. Low vitamin D levels have also been linked to worse PMS symptoms and more painful periods. 

HbA1c (diabetes)

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Between 50-70% of people with PCOS have insulin resistance — leading to raised blood sugar levels. A HbA1c test measures your average blood sugar levels over the past 2-3 months. This can help you monitor your risk of developing prediabetes or type 2 diabetes.

Cholesterol (lipid profile)

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A cholesterol profile test will look at the different types of fats (lipids) in your blood. This is useful to monitor if you have PCOS as this condition is linked to out of range lipid results (dyslipidaemia). Dyslipidaemia is linked to an increased risk of heart disease.

Collection method

Your test kit contains everything you need to collect your sample at home. Our instructions will guide you through it.

How it works

Thriva kit

Do your test

Your kit arrives in 1-2 days. Find out how to collect your sample at home. You’ll need to fill 2 tubes for this test — around 10 drops of blood.

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Get results in 48 hours

Free post your sample to our lab and get your results in 48 hours. Access your GP-reviewed report in your results dashboard.

Blood test results trend on laptop

Manage your PCOS symptoms

Our doctors give you evidence-based tips to help you manage PCOS symptoms. And you can access articles, podcasts, and recipes.

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When is the best time to do your PCOS blood test?

You should aim to do your PCOS test on day 3 of your period. This is when your reproductive hormone levels are easiest to interpret, giving you the best insights into your cycle.

If your periods are irregular, you should wait until your period starts to get useful insights.

If you have no periods, you can do a PCOS blood test at any time but it might be harder for our GPs to assess your results. Please mention this on your health profile.


How does your subscription work?

Your PCOS blood test arrives every 3 months. You can change your subscription and how often you’d like a test on your account dashboard. We’ll remind you that payment is due 3 days before your kit arrives. And you can pause, change, or cancel at any time.


Data protection

Your data is in safe hands. We use the latest encryption technologies and take our Data Protection obligations seriously.


What's included in your home testing kit?

Your Thriva test kit includes:

- collection tube(s)

- plaster x 2

- return form x 1

- alcohol swab x 1

- lancet x 3

- prepaid envelope x 1

- cleansing wipe x 1

- collection tube label(s)

- protective plastic case x 1


How to collect your sample at home

Learn how to collect your finger-prick blood sample at home by following our instructions. You can access these on the app too. It takes around 30 minutes to complete the process at home.


Will a GP write your report?

Our doctors review your blood test results and upload a detailed report to your account dashboard. They also give you advice to help support your health or manage an existing condition.


How long does it take to get your results?

Understanding your health should be quick and easy. That’s why our doctors share your results within 48 hours. And you can access your data at any time.


How do you know your results are ready?

We’ll email or text you to let you know your blood samples have been received, processed, and are ready to view on your results dashboard.