Fertility insights blood test

Start planning for the future with our fertility insights blood test. Get fast, accurate results and detailed commentary from a doctor.


  • Free delivery
  • Test arrives in 2-4 working days

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How can a fertility insights blood test help you?

How can a fertility insights blood test help you?

This test gives you valuable insights if you’re considering family planning now or in the future. You can also see if your egg count is in the normal range for your age.

It also shows if you have a condition that might affect your fertility — like a thyroid condition. It won't tell you how likely you are to get pregnant or if you're infertile. This test needs to be taken on Day 3 of your cycle

Fertility can be affected by:

With a GP report and tailored advice for your body, you'll have the support to start planning for the future.

What's included in this blood test?

Luteinising hormone (LH)

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Mid-cycle, your LH levels increase so you can ovulate. If your LH levels are imbalanced, you might have irregular periods and have trouble getting pregnant. High LH levels can indicate menopause or PCOS.

Follicle-stimulating hormone (FSH)

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FSH stimulates your ovaries to produce oestradiol. FSH and oestradiol work together to grow and develop the eggs in your ovaries — so when you ovulate the egg is ready to be fertilised by sperm.

Oestrogen (oestradiol)

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Oestradiol (E2) is essential for regulating your menstrual cycle and ovulation. It also plays a key role in building up the lining of your uterus — allows for a fertilised egg to become implanted if pregnant.


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Testosterone is essential for your sex drive, bone and muscle health, mood, and cognitive function. Your levels gradually drop as you age. If your levels are out of range you might feel tired, have a low sex drive, and have low mood.

Thyroid function

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An underactive thyroid can affect your menstrual cycle and ovulation. If you have a thyroid condition, it can increase your risk of pregnancy complications — like a miscarriage. But with treatment, these issues can be reversed.

Anti-Müllerian hormone (AMH)

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AMH is a hormone released by cells in your developing egg sacs (ovarian follicles). Testing your AMH levels can help determine the number of eggs you have left — your ovarian reserve.


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Prolactin is a hormone made by the pituitary gland. It helps stimulate milk production during breastfeeding and helps to regulate your menstrual cycle. High levels can prevent ovulation.

Women's hormones test infographic

When should you do this test?

The best time to do this test is on day 3 of your cycle (day 1 is your first day of bleeding) — this is when your results can be accurately interpreted.

If you have irregular periods

We recommend waiting until you have a period to get the most useful insights from this test.

If you have irregular periods combined with symptoms like acne, excess body hair (hirsutism), or weight gain, our PCOS blood test might give you better insights.

If you have no periods
You can do this test anytime, but it might be harder for our doctors to interpret your results.

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 test kit

Do your test at home

Your test kit arrives in 1-2 days with instructions on how to take your sample. Then free post it back to the lab.

Results on iPhone screen

Get fast, accurate results

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

Thriva supplements

Support your fertility

From lifestyle tips to dietary advice or premium supplements, follow your personalised advice to support your fertility.

Dr Macarena Staudenmaier, MD, MSc

Stop guessing, start learning

“Our fertility insights test can help you if you’re planning or trying to get pregnant. We explain how your hormone levels affect your chances of conceiving and how to improve this.” 

Dr Macarena Staudenmaier, MD, MSc

Clinical Innovation Lead at Thriva

It has been empowering and allowed me to take some control of the situation. I have learnt from the results, and with the strong guidance provided, I was able to investigate certain areas of my reproductive health.
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Over 200,000 customers and counting

Advice before doing this test


Why this test can't tell you about infertility

Infertility is the inability to get pregnant after one year of regular unprotected sex.

Because fertility is complex, we can’t measure all its contributing factors in a single blood test.

Other factors affecting fertility include fallopian tube damage or endometriosis, which can’t be detected in a blood test.

It’s important to know that many factors affecting fertility can be reversed or treated.

Learn more about fertility resources in the UK.


When should you do this blood test?

You should aim to do this 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 you don't have periods

You can do this test any time, but it might be harder for our doctors to interpret your follicle-stimulating hormone (FSH), luteinising hormone (LH), and oestradiol results.


If you have irregular periods

We recommend waiting until you have a period to get the most valuable insights from this test. Test on day 3 of your next cycle.


If you're on hormonal contraception

Your results might be harder to interpret if you take the contraceptive pill, injections, or have an implant. This doesn’t apply to the hormonal coil.


If you just stopped hormonal contraception

Wait 3 months before doing this test — this allows time for your natural cycle to return. If you were using the contraceptive injection, we recommended waiting a year.


If you use an oestrogen or testosterone cream/gel

If you use a topical oestrogen-containing or testosterone-containing cream or gel, always use a glove when applying it. Contact with your fingers could affect your testosterone result.


If you're breastfeeding

Breastfeeding can affect your hormone levels — which can make it difficult to accurately interpret your results. We recommend waiting until you've stopped breastfeeding before doing this test.


If you're pregnant

Don’t do this test if you're pregnant, as we won't be able to interpret your results.



Your data is in safe hands. We use the latest encryption technologies and continually assess our GDPR compliance.


Are your labs registered with the CQC?

Our labs are registered with the Care Quality Commission (CQC). Our testing kits our CE-marked. Learn more about labs and accuracy.


What's included in your test 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


Learn 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 doctor 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?

Our doctors aim to upload your results report to your account dashboard in as little as 48 hours from the lab receiving your sample. Tests containing Omega-3 & 6 have a 15-day turnaround time after posting your sample.


How do you know when 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 online on your results dashboard.