Over 99% accurate at detecting pregnancy from the day your period is due. As accurate as a doctor`s urine test. Clearblue is the number one brand most recommended in a survey of 401 doctors (2012). Test up to 4 days early In lab testing, 98% of pregnant results were detected the day before the period was due, 97% were deteceted 2 days before the period was due, 88% were detected 3 days before the period was due & 56% were detected 4 days before. Result in as fast as 1 minute A pregnant result may appear in q minute when testing from the day of your missed period. Wait 3 minutes to confirm a not pregnant result. Colour change tip The tip turns pinkfor easy targeting. Sample for 5 seconds.