Pregnancy test in cassette detects the hormone hCG at the 20mIUs level. In the pregnancy testing market, 20mIUs level is the lowest which means the most sensitive. This means that you can find out whether or not you are pregnant in just 6-7 days after conception. This pregnancy test is 99% accurate and is officially approved by FDA. It's easy-to-use and has simple test instructions. The results are ready in 2-5 minutes! Each pregnancy test is packaged individually in a sterile pouch bag. This value pack includes 5 tests. Shelf life - 2 years.