The Clearblue Advanced Digital Ovulation Test is the only one that typically identifies your 4 best days to get pregnant naturally - 2 more days than any other test . It identifies your 2 Peak Fertility days (Peak Fertility remains on the display continuously for 2 days) and, typically, 2 High Fertility days by accurately tracking 2 key fertility hormones, luteinizing hormone (LH) and estrogen - plus your 2 typically High Fertility days before that. So you have more opportunities to get pregnant naturally .
Once High Fertility has been detected (flashing smiley face), the holder will continue to display High Fertility until Peak Fertility has been identified.
Its unique smart algorithm is the only one that can adapt every time you test to indicate your wider personal fertility window