First response can detect the pregnancy hormone 6 days before your missed period
Things to know about testing early.... First response is 99% accurate at detecting the pregnancy hormone. However some pregnant women may not have detectable amounts of the pregnancy hormone in their urine the day they use the test. The amount of pregnancy hormone increases rapidly in early pregnancy. In clinical testing, first response detected the hormone levels 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 thir missed period, and in 98% of women 3 days before their missed period and 99% of women 2 days before their missed period

Indications
Advanced technology - Test may be used 6 days before the day of your missed period, at any time of the day
Over 99% accurate* in laboratory testing
Easy to read - Two pink lines = pregnant