A smiley face in the display means that the test has detected an LH surge and your 2 most fertile days are that day and the day after, meaning that sex within the next 48 hours will maximise your chances of getting pregnant.

A ‘blank circle’ symbolises a ‘No LH Surge’ result or a ‘smiley face’ indicating that the LH surge has been detected.It shows your fertility information on the easy to use touch screen as well as summarizing up to 6 cycles data on one screen for easy comparison.

All Clearblue Pregnancy Tests are 99% accurate at detecting pregnancy if you use it from the first day of your missed period.Indeed using 20 tests per cycle covered 99% of LH surge days in women with typical cycles when using the Clearblue Digital Ovulation Test. Remember, your results are personal to you and you may see more than 2 High Fertility days – see table in Q3. You cannot do another test while Peak Fertility is shown on the display as the holder will not be able to read it. The Clearblue Digital Ovulation Test therefore sets a personalised threshold level for each woman, by measuring their change in LH level from their personal baseline.

In clinical testing with early pregnancy samples Clearblue Advanced Fertility Monitor gave the following results: 96 Percent of women received a ‘pregnant’ result 1 day early, 91 Percent of women 2 days early, 74 Percent of women 3 days early. This is where Clearblue Ovulation Test kits can help, making it easier to find out when you’re most likely to become pregnant so you can make the most of your most fertile days. You’ve decided that the time is right and you can’t wait to hear the pitter patter of tiny feet around your home.It does this by accurately tracking two key fertility hormones, instead of just one like other ovulation kits do. When it detects a rise in your level of estrogen it displays High Fertility (flashing smiley face), and will continue to display High Fertility in the following days whilst it looks for your LH surge.

When the ovulation test detects a surge of oestrogen levels, it will notify you that you could be going through a highly fertile period, which can last for a few days. Clearblue Advanced Digital Ovulation Test is not intended for contraceptive use or if you do not have menstrual cycles.

The hormonal changes that happen during your cycle mean that you go through periods of higher and lower fertility, leading to a period of peak fertility which can last for around 48 hours. The Clearblue Digital Ovulation Test detects this rise LH, so you can identify your 2 best days to get pregnant. If you start testing too early in your cycle or too late (after the LH surge has occurred) then you may see a lot of High Fertility days. Take the guesswork out of starting a family by correctly working out when you’re ovulating with Clearblue Digital Ovulation Test. Its unique, smart algorithm is the only one that can adapt every time you test to indicate your personal wider fertility window.