FIRST TRIMESTER SCREEN (MATERNAL SERUM)

Sample Reports
Sample Abnormal Report
Sample Normal Report

Test Documentation
Prenatal Screen Information Sheet

Components
Includes: Pregnancy Associated Plasma Protein-A (PAPP-A), Human Chorionic Gonadotropin (hCG) and Nuchal Translucency (NT). Screens for Down syndrome and Trisomy 18.

Specimen Required
Draw blood in a plain red-top tube. Centrifuge, separate serum from cells within 2 hours of collection and send 1.0 mL serum (0.6 mL minimum) frozen within 24 hours in a screw-capped plastic tube. The following information must be submitted: CRL and NT measurement, ultrasonographer certification number from NTQR or FMF, maternal weight, maternal date of birth, insulin-depentdent diabetes status prior to pregnancy, multiple gestation (single, twin, triplets), race, and previous history of Down syndrome pregnancy for the patient. Sample should be collected between 11 weeks 0 days (CRL 42 mm) and 13 weeks 6 days (CRL (79.9 mm) gestation. Completed prenatal information sheet (supplied by Client services) must accompany sample.

Alternate Specimen
Serum: SST

Rejection Criteria
Moderately hemolyzed specimens, lipemic specimens, plasma

Methodology
Chemiluminescent Immunometric Assay

Stability
Room Temperature: Unacceptable; Refrigerated: 24 hours; Frozen: 14 days

Reference Range
By report

Performed
Monday-Friday

Turnaround Time4 days
Test CodeFTS
CPT-4 Code (s)
84163, 84702 (or 81508)

Warde
Medical
Laboratory