Hcg or human chorionic gonadotropin is a hormone. It’s produced immediately after egg implantation. These strips work by detecting the Hcg in urine samples to generate positive or negative 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. 12panelnow.com offers the fastest and most accurate urine tests available. Our hCG one-step pregnancy test strip 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. Performance characteristics Relative 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