The Clearblue Digital Pregnancy Test with Conception Indicator gives you double confirmation of the result. Its Smart Dual SensorTM not only tells you in words if you're pregnant or not, but if you are, it also shows you how many weeks pregnant you are.# Over 99% accurate from the day your period is due# The only test to also tell you the number of weeks since you conceived# Gives unmistakably clear results# So sensitive, you can test up to 4 days early*# Easy to use with its unique hourglass symbol to show you the test is working# The brand most recommended by doctors***If you test before your period is due and get a 'Not Pregnant' result, there is still a chance that you may be pregnant but that your hormone level is still not high enough for the test to detect. In clinical testing with early pregnancy samples the Clearblue Digital Pregnancy Test gave the following results: 55% of women received a 'Pregnant' result 4 days early, 86% of women 3 days early, 97% of women two days early and 99% of women 1 day early.** Research carried out in the UK.