Frequently Asked Questions About Using an Ovulation Predictor Test

Start testing on Day 6 of your menstrual cycle. To work out when Day 6 is you should count the day your period starts as Day 1, and continue counting through to Day 6. This is the day you should start testing.

If your usual cycle length is 41 days or more you can use this Test, but you should start testing on Day 12 of your cycle. To work out when Day 12 is you should count the day your period starts as Day 1, and continue counting through to Day 12. This is the day you should start testing.

You can test any time of the day, but it should be at about the same time each day (many women find it most convenient first thing in the morning). It is important that you have not urinated for at least 4 hours before testing, and you should avoid excessive fluid intake before testing.

The Clearblue Digital Ovulation Test helps you to pinpoint the 2 fertile days in your cycle by identifying a sudden surge in Luteinising Hormone (LH) in your body with a simple urine test. LH is the hormone that triggers the release of an egg from your ovary. This release – ovulation – usually occurs approximately 24 to 36 hours after the LH surge.

If you use it each day on the days around the time in your cycle when you expect the LH surge, you can predict the 2 days each cycle when you are most fertile and therefore most likely to get pregnant.

The time when you are most fertile is on the day the LH surge is detected and the day after. You are most likely to get pregnant if you have sex on these days. Clearblue Digital Ovulation Tests detect this LH surge, and therefore maximize your chances of conceiving.

Clearblue Digital Ovulation Tests have been shown in extensive laboratory trials to be over 99% accurate in detecting the LH surge before ovulation.

Please note: these are abbreviated instructions. Always read the in-pack leaflet before carrying out a test.
The Clearblue Digital Ovulation Test is very easy to use. When you’re ready to test remove a Test Stick from its foil wrapper. Before applying urine to the Test Stick it must be inserted into the Test Holder.

The Test Stick and Test Holder are marked with pink arrows that must be aligned to ensure correct insertion. The Test Stick clicks into place and a 'Test Ready' symbol appears on the Test Holder display.

When the ‘Test Ready’ symbol appears, you simply hold the Absorbent Sampler pointing downwards in your urine stream for 5 to 7 seconds. Alternatively, you can collect a sample of urine in a clean dry container and immerse just the Absorbent Sampler in the collected sample for 15 seconds.

Keep the Absorbent Sampler pointing downwards or lay the Test flat. After 20 to 40 seconds, the ‘Test Ready’ symbol will flash to show that the test is working. Do not eject the Test Stick. Replace the cap and then wipe off any excess urine.

Within 3 minutes, the display will show your result.

No Peak Fertility: A blank circle means a ‘No LH Surge’ result. Test again tomorrow at the same time using a new Test Stick.


Peak Fertility: A smiley face means the LH surge has been detected. There is no need to test again this cycle. Having sex any time in the next 48 hours will maximize your chances of getting pregnant.

Click here to watch the Digital Ovulation Test demo.