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Immunoassay

Meaning

An immunoassay is a sophisticated biochemical laboratory test used to precisely measure the presence or concentration of a specific analyte, typically a hormone, peptide, or drug, in a biological fluid by exploiting the highly selective binding of an antibody to its corresponding antigen. This technology is a cornerstone of modern endocrinology, enabling the sensitive and accurate quantification of circulating hormones like TSH, cortisol, and sex steroids. The high specificity ensures that only the target molecule is measured, providing reliable clinical data.