The GDF-9 enzyme linked immunosorbent assay (ELISA) kit, a three-step sandwich type immunoassay, provides materials for the quantitative measurement of GDF-9 in human serum and other biological fluids. Same day results with total 4.5 hour incubation at RT. Sensitive to 3 pg/mL. Sample size of 50 μL. Ansh Labs, located just south of Houston Texas, is an FDA registered manufacturer of diagnostic test kits, antibodies, antigens, and proteins. Our scientists are experts in immunoassay development and have developed some of the most challenging hormone assays helping to advance research and clinical diagnostics in reproductive function, growth disorders, metabolism, and more.