Cayman's Estrone-3-Glucuronide ELISA Kit is a competitive assay that can be used for quantification of estrone metabolites in urine, plasma and serum. This assay has a range from 2.7-6,000 pg/ml with a midpoint of approximately 125.6 pg/ml (50% B/B0) and a sensitivity of approximately 23.2 pg/ml (80% B/B0).