Maximize the chances of conceiving naturallynCompletely clear result: A smiley face in the indicator window pinpoints your 2 most likely days to get pregnantnOver 99% accurate at detecting your LH surgenTake the test any time of the dayn7 Clearblue Digital Ovulation Tests includednEvery woman's cycle is unique and most people don’t realize that there are only a few days in a woman’s cycle when intercourse can result in conception – and only 2 days when it is most likely: the day prior to and the day of ovulation. That’s why women turn to ovulation tests for help maximizing their chances for conception. The Clearblue Digital Ovulation Test is an easy-to-use home ovulation test, and is over 99% accurate at detecting the luteinizing hormone (LH) surge. The optical reader interprets your result and gives you a clear smiley face in the result window when the LH surge has been detected, identifying your 2 best days to try for a baby.