Clearblue Digital Ovulation Test--The most effective ovulation test kit Did you know that one in two couples could be trying to conceive on the wrong days of the woman's cycle? And did you know that your basal body temperature only increases after ovulation, making it not much use to aid conception in that cycle? The Clearblue DIGITAL Ovulation Test detects the rise of the ovulation hormone LH 24-36 hours prior to ovulation and identifies the 2 best days to conceive in a given cycle. Making love during these 2 days gives you your best chance of conceiving. The Clearblue DIGITAL Ovulation Test is the most effective home ovulation test kit. It gives you clear digital results, so there's no need to interpret the lines and gives you more test sticks than any other brand, making it more effective at detecting your LH surge. You use the Clearblue DIGITAL Ovulation Test once a day at the same time each day, on the days around the time when you expect your LH surge. It identifies the days in your cycle when you are most likely to conceive. How can ovulation tests maximise my chances of getting 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 make love on these days. Clearblue DIGITAL Ovulation Tests detect this LH surge, and therefore maximise your chances of conceiving.