Results 5 days sooner*. Only test with Smart Countdown to result. Over 99% accurate from the day of your expected period (99% accurate at detecting typical pregnancy hormone levels. Note that hormone levels vary. See insert). *Testing early: Clearblue recommends that you test from the day you expect your period. However, the pregnancy hormone increases rapidly in early pregnancy and Clearblue Digital can be used to test up to 4 days before you expect your period (5 days sooner than the missed period). In clinical testing with early pregnancy samples, Clearblue Digital gave results (see package).