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Prolactin, serum (ICMA); monomeric prolactin (ICMA); percent macroprolactin
Immunochemiluminometric assay (ICMA); PEG precipitation; An analyte-specific reagent (ASR) is used in this test.
Serum (preferred) or plasma, frozen
Do not draw sample until patient has been awake for at least two hours. Separate serum or plasma from cells within 45 minutes of collection. Transfer specimen to plastic transport tube before freezing. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.