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Clearblue Advanced Digital Ovulation Test Kit

Clearblue Advanced Digital Ovulation Test Kit

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  • ✔️ Detects both oestrogen and LH for wider fertile window
  • ✔️ Identifies up to 4 fertile days per cycle
  • ✔️ Digital display gives clear, unambiguous smiley face results
  • ✔️ Reusable holder adapts to your personal hormone baseline
  • ✔️ Over 99% accurate at detecting the LH surge

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What Is the Clearblue Advanced Digital Ovulation Test?

 

If you're trying to conceive, timing really does matter. The clearblue advanced digital ovulation test is a clinically validated, over-the-counter fertility monitor that identifies your two most fertile days — and up to four fertile days per cycle — by tracking two key hormones in your urine. Unlike basic ovulation strips that only detect one hormone, this kit measures both oestrogen and luteinising hormone (LH), giving you a broader, more accurate picture of your fertile window. According to the NHS, the days just before and after ovulation are when you are most likely to conceive, so knowing exactly when that window opens is genuinely useful.

Available from Cured Pharmacy for £24.99, this kit is a practical, non-invasive option for anyone who wants to take a more informed approach to family planning. If you're also exploring other aspects of your reproductive health, our women's health range includes a variety of products to support you at every stage.

 

How Does the Clearblue Advanced Digital Ovulation Test Work?

 

The science behind this test is straightforward once you understand the hormonal cycle. Here's how it works step by step:

  • Oestrogen detection (early cycle): As your body approaches ovulation, oestrogen levels begin to rise. The test detects this increase and displays a flashing smiley face — indicating "High Fertility."
  • LH surge detection: Just before ovulation, there is a sharp rise in LH. The test identifies this surge and displays a static smiley face — indicating "Peak Fertility," your two most fertile days.
  • Digital readout: Results appear clearly on a digital screen — no squinting at faint lines. You get an unambiguous symbol rather than an analogue result to interpret.
  • Hormone memory: The holder stores your personal hormone data throughout the cycle, calibrating results to your individual baseline rather than a population average.

This dual-hormone approach is what sets this kit apart from single-hormone LH-only tests. By detecting the oestrogen rise first, it can flag High Fertility days earlier — giving you more time to act on the information.

 

Who Should Use the Clearblue Advanced Digital Ovulation Test?

 

This test is designed for women who are actively trying to conceive and want to maximise their chances by identifying their fertile window accurately. It is particularly helpful if your cycles are irregular, as the test adapts to your personal hormone profile rather than relying on a fixed cycle-day calculation.

  • Women with cycle lengths between 21 and 35 days
  • Those who have been trying to conceive for a few months without success and want more insight
  • Women who prefer a clear digital result over analogue test lines
  • Anyone who wants to track both oestrogen and LH rather than LH alone

It is not suitable for use as a contraceptive device. It should also not be used by women with polycystic ovary syndrome (PCOS), premature menopause, or those currently undergoing fertility treatment — as these conditions can affect hormone levels and produce misleading results.

 

How Does the Clearblue Advanced Digital Test Compare to a Basic Ovulation Test?

 

Feature Clearblue Advanced Digital Basic LH Ovulation Strip
Hormones detected Oestrogen + LH LH only
Fertile days identified Up to 4 per cycle Typically 1–2 per cycle
Result display Digital smiley face symbol Analogue line (requires interpretation)
Personalised hormone baseline Yes — holder stores data No

 

Is the Clearblue Advanced Digital Ovulation Test Clinically Reliable?

 

Clinical studies referenced by the manufacturer indicate that the test is over 99% accurate at detecting the LH surge when used correctly. The dual-hormone detection method has been validated in peer-reviewed research and is consistent with the NHS guidance that tracking ovulation can help couples identify the best time to try for a baby. The clearblue advanced digital ovulation test is a CE-marked medical device, meaning it meets European safety and performance standards applicable in the UK.

Store the kit below 30°C, away from direct sunlight and moisture. Keep test sticks in their sealed foil pouches until use. If you're also supporting your preconception health nutritionally, our vitamins and supplements collection includes folic acid and other pregnancy-support products.

This product is a medical device. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

Clearblue Advanced Digital Ovulation Test Kit specifications
Treatment category Fertility monitoring / Ovulation prediction
Mechanism of action Detects urinary oestrogen metabolite (E3G) and LH surge
Effective Over 99% accurate at detecting LH surge
Suitable for Women with cycle lengths of 21–35 days trying to conceive
Active ingredient N/A — diagnostic device (no active pharmaceutical ingredient)
Pack sizes 10 test sticks + 1 reusable digital holder
UK classification CE-marked medical device (General Sale)
Preparation Urine dipstick test sticks with digital reader
Route of administration Urine (midstream or collected sample)

Specifications of Clearblue Advanced Digital Ovulation Test Kit

 

What Is the Clearblue Advanced Digital Ovulation Test Kit and What Is It Used For?

 

The Clearblue Advanced Digital Ovulation Test Kit is an over-the-counter medical device used to identify your most fertile days within your menstrual cycle. It works by detecting two hormones — oestrogen (measured as its urinary metabolite, oestrone-3-glucuronide or E3G) and luteinising hormone (LH) — in your urine. The NHS advises that you are most likely to conceive if you have sex in the days around ovulation, which typically occurs around day 14 of a 28-day cycle, though this varies considerably between individuals.

By identifying both High Fertility days (rising oestrogen) and Peak Fertility days (LH surge), this kit gives you a wider fertile window to work with — up to four days per cycle rather than the one or two days a basic LH-only test might flag. It is intended solely as a conception aid and must not be used as a method of contraception.

 

What Do You Need to Know Before Using the Clearblue Advanced Digital Ovulation Test Kit?

 

Before you start testing, there are some important conditions and circumstances that may affect your results or make this test unsuitable for you.

Do not use this test if you:

  • Are already pregnant
  • Have reached or are approaching the menopause
  • Have been diagnosed with polycystic ovary syndrome (PCOS) — elevated LH levels associated with PCOS can cause false Peak readings
  • Have recently been pregnant, miscarried, or given birth (hormone levels may not have returned to baseline)
  • Have a condition affecting your pituitary gland or hypothalamus, which regulates LH and oestrogen production
  • Have ovarian failure or are undergoing treatment for it

Medicines and substances that may interfere with results:

  • Clomifene citrate (a fertility medicine that stimulates ovulation)
  • Medicines containing human chorionic gonadotrophin (hCG)
  • Hormone replacement therapy (HRT) containing oestrogen
  • Some hormonal contraceptives — if you have recently stopped taking the pill, your cycle may be irregular and results unreliable
  • Tetracycline antibiotics (may affect urinary hormone excretion in some cases)

If you are unsure whether any medicine you take could affect the test, speak to your pharmacist or GP before using it.

 

How Should You Use the Clearblue Advanced Digital Ovulation Test Kit?

 

Using the kit correctly is essential for accurate results. Follow these steps each time you test:

  1. Check the instruction leaflet to find the day of your cycle on which you should begin testing (based on your usual cycle length).
  2. Remove a test stick from its sealed foil pouch immediately before use.
  3. Insert the test stick into the digital holder until it clicks into place.
  4. Hold the absorbent tip pointing downward in your urine stream for exactly 15 seconds, or dip it into a collected urine sample for 15 seconds.
  5. Lay the holder flat with the display facing upward and wait 3 minutes.
  6. Read the result: a flashing smiley face indicates High Fertility; a static smiley face indicates Peak Fertility; a circle indicates Low Fertility.
  7. Test at the same time each day for consistency. Avoid drinking large amounts of fluid for 2 hours before testing.
  8. Once Peak Fertility has been detected, you do not need to continue testing for that cycle.
Indication User Group Tests Per Cycle Frequency
Ovulation prediction Women aged 18+ trying to conceive Up to 10 sticks per kit Once daily from the start day indicated

 

What Are the Possible Side Effects of the Clearblue Advanced Digital Ovulation Test Kit?

 

As a diagnostic device rather than a medicine, the Clearblue Advanced Digital Ovulation Test Kit does not introduce any active pharmaceutical ingredient into your body and therefore has no pharmacological side effects. However, there are some practical and emotional considerations worth being aware of.

Common considerations:

  • Emotional stress or anxiety if the test does not detect a Peak Fertility reading within a cycle — this does not necessarily mean you are not ovulating
  • Confusion if results appear inconsistent due to irregular cycles or recent hormonal changes
  • Skin irritation from urine contact if you have sensitive skin — wash hands thoroughly after use

Less common considerations:

  • False Peak readings in women with PCOS due to naturally elevated LH levels
  • No Peak detected in a cycle — this can occur if ovulation was missed, occurred earlier than expected, or did not happen that cycle

If you are concerned that you are not ovulating regularly, speak to your GP. The NHS recommends seeking medical advice if you have been trying to conceive for over a year (or six months if you are over 35) without success. You might also find it helpful to explore our condoms and sexual health collection for related products.

 

How Should You Store the Clearblue Advanced Digital Ovulation Test Kit?

 

  • Store the kit and test sticks below 30°C
  • Keep away from direct sunlight and sources of heat
  • Do not store in the bathroom or any area with high humidity
  • Keep test sticks in their individual foil pouches until immediately before use
  • Do not use test sticks after the expiry date printed on the packaging
  • Keep out of reach of children
  • Do not freeze

The digital holder is reusable across multiple cycles. Keep it clean and dry between uses. If the holder displays an error symbol, refer to the troubleshooting section of the instruction leaflet. For general preconception wellbeing, including folic acid supplementation which the NHS recommends before and during early pregnancy, visit our vitamins and supplements collection.

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Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy the Clearblue Advanced Digital Ovulation Test Kit online in the UK?

You can buy the Clearblue Advanced Digital Ovulation Test Kit directly from Cured Pharmacy online for £24.99 with fast UK delivery. It is a general sale medical device, so no prescription is needed. It is also available in some high street pharmacies and supermarkets, though online ordering is often more convenient and discreet.

How does the Clearblue Advanced Digital Ovulation Test work in the body?

The test detects two hormones in your urine — oestrone-3-glucuronide (a urinary metabolite of oestrogen) and luteinising hormone (LH). Rising oestrogen is detected first, flagging High Fertility days, and then the LH surge identifies your Peak Fertility days — the 24–36 hours when ovulation is most imminent. This dual-hormone approach gives you up to four fertile days per cycle rather than just one or two.

How do I use the Clearblue Advanced Digital Ovulation Test step by step?

Insert a test stick into the digital holder, hold the absorbent tip in your urine stream for 15 seconds (or dip into a collected sample), then lay it flat and wait 3 minutes for the result. A flashing smiley face means High Fertility, a static smiley face means Peak Fertility, and a plain circle means Low Fertility. Begin testing on the day indicated in the leaflet based on your cycle length, and test at the same time each day.

When is the best time of day to use the Clearblue Advanced Digital Ovulation Test?

You can test at any time of day, but it is important to test at the same time each day for consistency. Avoid drinking large amounts of fluid for at least two hours before testing, as this can dilute your urine and reduce hormone concentration. First morning urine is a popular choice as hormone levels tend to be more concentrated.

Can fertility medicines affect the Clearblue Advanced Digital Ovulation Test results?

Yes — medicines containing hCG, clomifene citrate, or oestrogen (including some HRT preparations) can interfere with the test and produce inaccurate or misleading results. If you are taking any fertility treatment or hormonal medication, speak to your GP or fertility specialist before using this test. Do not rely on the results if you are mid-treatment cycle.

Who is the Clearblue Advanced Digital Ovulation Test suitable for?

It is suitable for women aged 18 and over with regular or slightly irregular cycle lengths between 21 and 35 days who are trying to conceive naturally. It is not suitable for women with PCOS, premature menopause, ovarian failure, or those currently undergoing fertility treatment, as these conditions can cause hormone levels that interfere with accurate readings. If you have any of these conditions, speak to your GP before using the test.

What is the difference between High Fertility and Peak Fertility on the Clearblue test?

High Fertility (flashing smiley face) means your oestrogen levels are rising and you are entering your fertile window — this is a good time to start trying to conceive. Peak Fertility (static smiley face) means your LH surge has been detected and ovulation is expected within 24–36 hours — this is your most fertile time. Both readings indicate days when conception is possible, but Peak Fertility represents your highest chance.

How many test sticks are included in the Clearblue Advanced Digital Ovulation Test Kit?

The standard kit includes 10 test sticks and one reusable digital holder. The holder can be used across multiple cycles — you simply purchase additional test stick refill packs when needed. Ten sticks are generally sufficient for one full cycle of testing, though women with longer cycles or those who begin testing early may use more.

What happens if the Clearblue Advanced Digital Ovulation Test does not detect a Peak Fertility day?

If no Peak Fertility reading appears during a cycle, it may mean ovulation occurred outside your testing window, your LH surge was very brief and missed, or ovulation did not occur that cycle — which can happen occasionally even in healthy women. It does not necessarily indicate a fertility problem. If this happens repeatedly over several cycles, speak to your GP for further investigation.

Is the Clearblue Advanced Digital Ovulation Test accurate?

The test is reported to be over 99% accurate at detecting the LH surge when used correctly, according to the manufacturer's clinical validation data. It is a CE-marked medical device, meaning it meets the safety and performance standards required for sale in the UK. Accuracy depends on following the instructions carefully, testing at a consistent time each day, and not using the test if you have conditions or medications that affect hormone levels.

Can I use the Clearblue Advanced Digital Ovulation Test if I have irregular periods?

The test can be used if your cycles vary somewhat in length, as the digital holder adapts to your personal hormone baseline rather than using a fixed population average. However, if your cycles are very irregular — for example, due to PCOS or another hormonal condition — results may be unreliable. The NHS recommends speaking to your GP if your periods are consistently irregular and you are trying to conceive.

What are the alternatives to the Clearblue Advanced Digital Ovulation Test?

Alternatives include basic LH-only ovulation test strips, which are cheaper but detect only one hormone and typically identify fewer fertile days. Fertility monitors such as the Clearblue Fertility Monitor offer more detailed cycle tracking over time. You can also track ovulation using basal body temperature (BBT) charting or cervical mucus monitoring, though these methods require more time and practice to interpret accurately. For related products, browse our women's health collection.

How long should I use the Clearblue Advanced Digital Ovulation Test before seeing a doctor?

The NHS advises that if you are under 35 and have been trying to conceive for over a year without success, you should see your GP. If you are 35 or older, seek advice after six months of trying. Using an ovulation test can help you confirm whether you are ovulating and timing intercourse correctly, but it is not a substitute for medical investigation if conception is not occurring.

Can I use the Clearblue Advanced Digital Ovulation Test while breastfeeding?

Breastfeeding can suppress ovulation and affect hormone levels, which may make the test results unreliable. If your periods have not yet returned after giving birth, it is unlikely the test will detect a meaningful cycle. Speak to your GP or midwife before using ovulation tests while breastfeeding, particularly if you are hoping to conceive again soon after a previous pregnancy. You may also find our baby and toddler collection useful during this period.

What are the latest findings on digital ovulation tests and conception rates?

Research published in peer-reviewed journals has consistently shown that timed intercourse guided by ovulation predictor kits can improve conception rates compared to unguided attempts, particularly in couples who have been trying for several months. Dual-hormone tests that detect both oestrogen and LH have been shown to identify a wider fertile window than LH-only tests. NICE guidance on fertility (CG156) supports the use of ovulation prediction as part of a structured approach to natural conception.

How Should You Use the Clearblue Advanced Digital Ovulation Test Kit?

Using the kit correctly from the start gives you the most reliable results. Before your first test, check the instruction leaflet to identify the day of your cycle on which you should begin testing — this is based on your usual cycle length. Test once a day at the same time each day, and avoid drinking large amounts of fluid for at least two hours beforehand.

Follow these steps each time you test:

What Is the Correct Dose of the Clearblue Advanced Digital Ovulation Test Kit?

This is a diagnostic device rather than a medicine, so "dose" refers to the number of tests used per cycle. The kit contains 10 test sticks, which is sufficient for one full cycle of daily testing for most women. If your cycle is longer or you begin testing early, you may need a refill pack for subsequent cycles.

When Is the Best Time to Use the Clearblue Advanced Digital Ovulation Test Kit?

Test at the same time each day for the most consistent hormone readings. While first morning urine is often recommended because hormone concentrations tend to be higher, the test can be used at any time of day as long as you have not consumed large amounts of fluid in the two hours beforehand. Consistency in timing is more important than the specific time of day you choose.

Begin testing on the day specified in the instruction leaflet for your cycle length. Starting too late in your cycle risks missing the oestrogen rise that signals the beginning of your fertile window.

How Long Can You Use the Clearblue Advanced Digital Ovulation Test Kit For?

The digital holder is reusable across multiple cycles — simply purchase additional test stick refill packs when your current supply runs out. There is no defined limit on how many cycles you can use the test for. However, if you have been using the test correctly for several cycles without detecting a Peak Fertility reading, or if you have been trying to conceive for 12 months (or 6 months if you are over 35) without success, the NHS recommends speaking to your GP for further assessment.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

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What Are the Most Common Considerations When Using the Clearblue Advanced Digital Ovulation Test Kit?

Because this is a diagnostic medical device rather than a medicine, it does not introduce any active pharmaceutical ingredient into your body. There are therefore no pharmacological side effects in the traditional sense. That said, there are practical and emotional considerations that some users experience when using ovulation tests regularly.

  • Emotional stress or anxiety when a Peak Fertility reading does not appear within a cycle
  • Frustration if results seem inconsistent or unexpected
  • Mild skin irritation from urine contact if you have particularly sensitive skin — wash hands thoroughly after each test

What Are the Less Common Issues Associated With the Clearblue Advanced Digital Ovulation Test Kit?

Some users may encounter less common issues that affect the reliability or interpretation of their results. These are not side effects in a medical sense, but they are worth being aware of before you start testing.

  • False Peak Fertility readings in women with polycystic ovary syndrome (PCOS), due to naturally elevated LH levels unrelated to ovulation
  • No Peak detected across an entire cycle — this can occur if ovulation was missed, happened earlier than expected, or did not occur that month
  • Multiple High Fertility days without a Peak reading — this may indicate a slow or absent LH surge
  • Error symbols on the digital display — usually caused by incorrect test stick insertion or a damaged stick

What Are the Serious Concerns to Be Aware of With the Clearblue Advanced Digital Ovulation Test Kit?

While the test itself carries no serious medical risks, there are important clinical situations where using it could lead to misinterpretation of your fertility status. Women with conditions such as PCOS, premature ovarian insufficiency, or hypothalamic dysfunction may receive misleading results that do not accurately reflect their ovulatory status. Relying on inaccurate results could delay seeking appropriate medical care.

Additionally, this test must never be used as a contraceptive method. It is designed to help you identify fertile days to maximise the chance of conception — not to avoid pregnancy. Using it for contraception could result in unintended pregnancy.

What Should You Do If You Experience Unexpected Results?

If you consistently fail to detect a Peak Fertility reading over two or more cycles, or if you receive results that seem inconsistent with your symptoms or cycle pattern, do not simply repeat the test indefinitely. Speak to your GP, who can arrange blood tests to assess your hormone levels and confirm whether ovulation is occurring. The NHS advises that women under 35 who have been trying to conceive for over a year, and women over 35 who have been trying for six months, should seek medical advice.

Can the Clearblue Advanced Digital Ovulation Test Kit Interact With Other Medicines?

The test does not interact with medicines in a pharmacological sense, but certain medicines can affect the hormone levels it measures, leading to inaccurate results. These include clomifene citrate, medicines containing human chorionic gonadotrophin (hCG), oestrogen-containing hormone replacement therapy, and some hormonal contraceptives. If you are taking any of these, speak to your GP or pharmacist before using the test to discuss whether results are likely to be reliable.

If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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