The QUIK-TRAK Combi Test is a rapid qualitative immunoassay for the detection of human gonadotropin (hCG) in serum or urine. The test utilizes a combination of monoclonal and polyclonal antibody reagents to selectively detect elevated levels of hCG. The assay is conducted by the addition of specimen into the sample well and observing for the formation of colored lines in the result area. The specimen migrates via capillary action along the membrane and reacts with the antibody-dye conjugate. Positive hCG specimens react with the specific antibody-hCG-colored conjugate and form a colored line in the Test Zone (T) portion of the membrane. Absence of this colored line suggests a negative result. To serve as a positive procedural control, a colored line in the Control Zone (C) will always appear regardless of the presence or absence of hCG.