All pregnancy tests are not the same. First Response Early Result In-stream Pregnancy Test with patented ultra-sensitive technology can detect very low levels of the pregnancy hormone, so you can know sooner. Early Results test 6 days before your missed period (5 days before the day of expected period) Accurate over 99% accurate† * from the day before your expected period Easy to read and use results in 3 minutes Clinically Proven. First Response™ detected the hormone levels in 62% of women, 6 days before the day of the missed period (5 days before the day of expected period), in 78% of women 5 days before their missed period, in 87% of women 4 days before their missed period, in 98% of women 3 days before their missed period and in 99% of women 2 days before their missed period.