When you want to know if you’re pregnant waiting to test can be hard. That’s why Clearblue Ultra Early Pregnancy Test can be used up to 6 days before your missed period, which is 5 days before the day you would expect your period to start (your expected period). In 79% of samples tested in a lab study, pregnancy could be detected up to 6 days before the missed period (which is 5 days before the expected period). Clearblue Ultra Early is our most sensitive pregnancy test - no test can tell you sooner.