Maternal Screening, Sequential, Specimen #2, Alpha Fetoprotein, hCG, Estriol, and Inhibin A MSCR2
|Method(s)||Quantitative Chemiluminescent Immunoassay|
One 5 mL gold (SST) or plain red top tube.
Separate from cells ASAP or within 2 hours of collection. Transfer 3 mL serum refrigerated to an ARUP Standard Transport Tube. (Min: 1 mL)
Requires that a previous first trimester specimen, Maternal Screening, Sequential, Specimen #1, hCG, PAPP-A, NT (ARUP test code 3000146), has been performed.
After separation from cells: Ambient: 72 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles).
Plasma, Hemolyzed specimens.
|Notes||See attached required requisition and patient consent. Patient Prep: Specimen must be drawn between 14 weeks, 0 days and 24 weeks, 6 days gestation. The recommended time for maternal serum screening is 16 to 18 weeks gestation.|
|Preferred Specimen Collection Device(s)|