The Clearblue Digital Ultra Early Pregnancy Test offers ultra-sensitive early detection of the pregnancy hormone with clear digital results. It is over 99% accurate and can be used up to 6 days before your missed period. The test features SmartGuardâ„¢ Technology, including an extra-wide tip, Floodguardâ„¢ feature, stop light, and Smart Countdown for clear digital results in words. It has an hCG sensitivity of 10mIU/ml, allowing for early detection. Clearblue is the number 1 brand most recommended by doctors in the UK, with over 40 years of scientific expertise.