Surescreen hCG One-Step Pregnancy Test An extremely accurate pregnancy test for early diagnosis in a low cost strip format, Surescreen One-Step tests are easy to use by dipping into urine and low cost. The tests use immunoassay technology - offering more than 99% accuracy - and are CE Marked and FDA Approved. Surescreen One-Step tests are able to detect hCG, the chemical marker for pregnancy, as early as one day after the first missed menstrual period. Features Affordable Simple testing procedure - no special reagents or equipment required Accurate, easy-to-read results in just minutes