The QuickVue One-Step hCG Combo test detects human chorionic gonadotropin (hCG) in serum or urine. It is used for early detection of pregnancy.The test is easy to perform and read with two-color endpoint on a white background. It has a 25 mIU/mL sensitivity. It can detect low hCG levels as early as 2-3 days before expected menstruation.Only three drops are required for a sample. Results are available in 3-5 minutes.