First Response Instream 7 Pregnancy TestsAll pregnancy tests are not the same. With its sensitive technology, First Response Early Result In Stream Pregnancy Test can detect very low levels of the pregnancy hormone 6 days before the day of your missed period (5 days before expected period). EARLY RESULTS test 6 DAYS before your missed period (5 days before day of expected period). Over 99% accurate from the day of your expected period. Test any time of the day, with results in 3 minutes.