Test strip that detects Pregnancy in Urine about 12 days after conception.
Urine hCG concentration in pregnant women rises very rapidly after implantation, reaching a peak concentration in excess of 200 IU/mL about 2-3 months after the last menstrual period. The hCG Rapid Test Device (Urine) has a sensitivity of 25 mIU/mL for urine and is capable of detecting pregnancy as early as 1 day after the first missed menses. Reportedly, a level of 25 mIU/mL or more is present 7-10 days after conception or 4-5 days prior to the first missed menses. Test results which appear as very light bands in the test region are not definitive for the diagnosis of pregnancy. It is strongly recommended that an additional urine specimen be obtained after 48-72 hours and tested. Patients suspected to be pregnant but showing negative test results should be re-tested with first morning specimens obtained 48-72 hours later.
The HCG Rapid Test Strip (Urine) detects human chorionic gonadotropin through visual interpretation of color development on the strip. Anti-hCG antibodies are immobilized on the test region of the membrane and anti-mouse antibodies on the control region. During testing, the specimen reacts with anti-hCG antibodies conjugated to colored particles and pre-coated onto the sample pad of the strip. The mixture then migrates through the membrane by capillary action and interacts with reagents on the membrane. If there is sufficient hCG in the specimen, a colored band will form at the test region of the membrane. The presence of this colored band indicates a positive result, while its absence indicates a negative result. The appearance of a colored band at the control region serves as a procedural control, indicating that the proper volume of specimen has been added and membrane wicking has occurred.