Best Ovulation Tests and Fertility Trackers UK (2026)

Ovulation tests can take some of the guesswork out of trying for a baby, but they are not essential. The NHS says more than 8 in 10 couples where the woman is under 40 will conceive within a year if they have regular unprotected sex every 2 or 3 days. Tests are most useful if you have limited time together, irregular cycles or simply want more information.

See a GP if you have not conceived after a year of trying, or sooner if you are 36 or over, have irregular or absent periods, or know of a possible fertility problem.

How do ovulation tests work?

• LH tests detect the surge of luteinising hormone (LH) in urine, which happens about 24 to 36 hours before an egg is released. A positive result marks your 2 most fertile days.
• Dual-hormone tests also track oestrogen, which rises before LH, so they show extra "high fertility" days earlier.
• PdG tests detect a breakdown product of progesterone, which rises after ovulation. They confirm that ovulation probably happened.
• Temperature trackers record the small rise in body temperature after ovulation. They confirm ovulation in hindsight but cannot warn you in advance.

What does the evidence say?

The Cochrane review on timed intercourse found the evidence was low quality. Pooled trials showed no clear difference in clinical pregnancy rates when couples used ovulation prediction, and one study looked at stress. So tests help you understand your cycle, but frequent sex across the cycle is still the simplest approach.

Can ovulation tests or trackers be used as contraception?

No. Ovulation tests, Mira, Proov and Tempdrop are designed to help you conceive and are not certified as contraceptives. The NHS says fertility awareness methods are 91 to 99% effective with perfect use but only 76% with typical use, and that no apps or monitors are officially recommended by the NHS.

The exception is Natural Cycles, an app with a thermometer that is CE-marked as a medical device for contraception. NICE notes it has not been directly compared with other methods, and the ASA ruled in 2018 that calling it "highly accurate" was misleading. Most other contraception is free on the NHS and more reliable in typical use. Talk to a GP or sexual health clinic if avoiding pregnancy matters to you.

Our picks at a glance

How we chose

We looked at the main types of home fertility testing sold to UK buyers, checked live prices at Boots and brand stores, and worked out the cost per test. We graded the evidence for what each type claims to do, not the marketing. We did not list cheap unbranded strips from marketplaces because we could not verify a UK seller and sensitivity. One Step strips are popular but we could only find them through marketplace sellers, so they are not listed.

Boots Ovulation Tests (20 pack)

Our budget pick: a plain LH test stick at about £1.45 a test, enough for one or two cycles. Caveat: you compare two lines yourself, which can be confusing when the test line is nearly as dark as the control. Boots does not state the sensitivity level. A 7-pack (£10.99) is available if you want to try them first.

Clearblue Digital Ovulation Test Kit (10 tests)

Our top pick for most people. It detects the LH surge and shows a smiley face for your 2 most fertile days, which removes any guesswork. Caveat: at about £2 a test it costs more than line sticks, and it does not confirm that ovulation happened.

Clearblue Advanced Digital Ovulation Test Kit (10 tests)

Tracks oestrogen as well as LH, so it typically shows 4 or more fertile days per cycle, giving more time to try. Caveat: around £32 for 10 tests, and results can be harder to read if you have PCOS (polycystic ovary syndrome), where LH can be high throughout the cycle.

Proov Predict & Confirm Ovulation Kit

Combines 15 LH strips with 5 PdG strips. The PdG tests check that progesterone has risen after ovulation, which a standard ovulation test cannot tell you. Caveat: Proov ships from the US, so delivery is slower and returns harder. Confirming ovulation is useful information but not a fertility diagnosis.

Mira Hormone Monitor: Max Kit

A small analyser that reads test wands and gives number values for LH, oestrogen and a progesterone marker. It can make an irregular pattern easier to follow and to share with a doctor. Caveat: expensive upfront, with ongoing wand costs, and there is little independent research showing it helps people conceive faster than simple LH tests.

Tempdrop 2.0 Advanced Fertility Monitor

A sensor worn on the upper arm overnight that records your temperature trend, so you do not have to wake at the same time each day. Caveat: temperature only rises after ovulation, so it confirms ovulation in hindsight. It is not a contraceptive.

Who should be careful with ovulation tests?

• PCOS or irregular cycles: LH can be raised for long stretches, giving repeated positives. Numeric monitors or GP advice may be more useful.
• Perimenopause: rising hormone levels can give misleading results.
• Fertility drugs: medicines containing LH or hCG can affect readings. Ask your clinic.
• Recent pregnancy, miscarriage or stopping hormonal contraception: cycles may be irregular for a while.
• Stress: if testing becomes a source of anxiety, it is fine to stop and simply have sex every 2 or 3 days, as the NHS suggests.

What to look for in an ovulation test

1. Cost per test, since you may test for 5 to 10 days a cycle.
2. Easy-to-read results if faint lines worry you.
3. What it measures: LH only, LH plus oestrogen, or confirmation with PdG.
4. A UK seller for quicker delivery and easier returns.
5. Honest claims: be wary of anything implying it doubles as contraception.

Bottom line

Start simple. The NHS says sex every 2 or 3 days gives most couples a good chance within a year. If you want a test, Boots own-brand sticks are the cheapest way to find your LH surge, Clearblue Digital is the easiest to read, and Proov adds confirmation that ovulation happened. Keep Mira and Tempdrop for specific needs such as irregular cycles or shift work, and never rely on any of them as contraception unless the product is certified for that use.