Check the listing for details. [25 Pack] Pregnancy Strips (HCG Test) CLIA & FDA Approved - Multi-Pack Quantity. Condition: New. Listed at 19.99 USD. HCG Test StripsOur HCG test has chemically-infused membranes that help identify the pregnancy hormone’s presence in pee.It’s safe, accurate, and easy to use. Dip in urine, wait for 3 minutes, then read the results.The HCG Pregnancy Test Strips are one of the safest ways to determine pregnancy at home, but it is also a convenient way to determine test results quickly.These results are 99% accurate if used properly.With our tests, you can begin testing at 7-10 days past ovulation. A negative result this early is not always conclusive and does not foreclose the possibility of pregnancy: You can get a negative test result if HCG increases more gradually.Available in packs of 25 strips PositiveOnly one colored band appears, in the control region ©. No apparent colored band appears in the test region (T)NegativeTwo colored bands appear on the membrane. One brand appears in the control regions © and another appears in the test region (T).InvalidControl band fails to appear.Results from any test which has not produced a control band at the specified read time must be discarded.Please review the procedure and repeat with a new test.If the problems persist, discontinue using the kit immediately and contact your local distributor.Performance characteristicsRelative sensitivity:>99.9% (98.7%-99.9%)*Relative specificity: >99.9% (99.8%-100.0%)*Overall Agreement: >99.9% (99.7%-99.9%)**95% Confidence Interval