Clearblue Early Detection Pregnancy Test Clearblue's Early Detection Pregnancy Test is over 99% accurate at telling you whether you are pregnant or not, from the day your period is due. You can even do this early test up to 6 days before your missed period. * This Clearblue pregnancy test has a colour changing test tip that turns pink for easier testing. Hold it in your urine for 5 seconds. After 3 minutes you can read the test result. * Early testing: The 'missed period' refers to the day after your period is due. In 79% of samples tested in a laboratory study, pregnancy was detected 6 days before the missed period (this is 5 days before the due period).