Healthcare provider discussing hormone lab results with a patient during a clinical evaluation.

Interpreting Hormone Labs Beyond “Normal” Reference Ranges

A hormone result can fall inside a laboratory reference interval and still require thoughtful interpretation. These ranges are based on defined populations, while hormone measurements can vary with age, sex, time of day, assay method, medications, binding proteins, and physiologic state. Research on endocrine testing has shown that differences among assays and reference intervals can

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