BioSign® hCG—One Step Pregnancy Test Is a simple immunoassay for the Qualitative Detection of Human Chorionic Gonadotropin (hCG) in Urine for the Early Detection of Pregnancy. The BioSign® hCG—One Step Pregnancy Test is a rapid test for detecting pregnancy. The test is a solid-phase, two-site immunometric assay in which a combination of monoclonal and polyclonal antibodies is used to selectively detect hCG in urine with a high degree of sensitivity. In the test procedure, sample is added to the sample well using a dropper and sample is allowed to soak in. If hCG is present in the specimen, it will react with the conjugate dye, which binds to the antibody on the membrane to generate a coloured line. Presence of two-coloured lines, one at the Test position and the other at the Control position, indicates a positive result, while the absence of the line at the Test position indicates a negative result.