... after fertilization. During normal pregnancy, HCG can be detected in urine as early as 7 days following conception, doubling every ... presence of HCG soon after conception and its subsequent increase in concentration during early gestational growth make it an ideal ... HCG10A, HCG11A, HCG12A, HCG20A, HCG13A, HCG 23A Type: Strip, Strip, Cassette Specimen:Urine Package: 1PC x 100/kit Specification: 2.5mm ...