Trusted for over 35 years. Easy-to-read results. Over 99% accurate (over 99% accurate from the day of expected period at detecting typical pregnancy hormone levels. Note that hormone levels vary. See leaflet). No brand more precise. Results 5 days sooner. Ultra accurate tip. Testing before missed period? The EPT pregnancy test can be used up to 4 days before your expected period, which is 5 days sooner than waiting until you miss your period to test. For best results it is recommended you test the day of your expected period. Levels of the pregnancy hormone vary greatly, which makes testing earlier less reliable. If you test early and get a negative result, the distributor of EPT recommends retesting on the day of your expected period. In laboratory testing, EPT detected the pregnancy hormone levels in 53% of women at 4 days before their expected period, in 74% at 3 days before their expected period, in 84% at 2 days before their expected period, in 87% at 1 day before their expected period and in 99% on the day of their expected period. Questions call 800-378-1783, 9 am - 5 pm EST weekdays or visit us at eptfamily.com. Facebook. Twitter.