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) refrigerated within 48 hours in a screw-capped plastic tube. Sample should be collected between 11 weeks 0 days (CRL 42 mm) and 13 weeks 6 days (CRL 79.9 mm) gestation. Completed Prenatal Screen Information Sheet located (above) under Test Documentation and in the Appendices of the Test Directory, must accompany sample.

Alternate Specimen
Serum: SST

Rejection Criteria
Moderately hemolyzed specimens, lipemic specimens, plasma

Methodology
Chemiluminescent Immunometric Assay

Stability
Room Temperature: 5 days; Refrigerated: 7 days; Frozen: 2 month

Reference Range
By report

Performed
Monday-Friday

Turnaround Time4 days
Test CodeFTS
CPT-4 Code (s)
81508 (or 84163, 84702)
LOINC Codes
Screen result:   50679-0  
Age at EDD (years):   43993-5  
GA (weeks):   49051-6  
GA (days):   49052-4  
Ultrasound Date:   34970-4  
CRL:   11957-8  
Nasal Bone:   53697-9  
Weight (lbs):   58229-6  
Multiple Gestation:   11878-6  
Ethnic Origin:   21484-1  
IDDM:   44877-9  
Smoker:   63638-1  
NT:   12146-7  
PAPP-A:   48407-1  
hCG:   21198-7  
NT MOM:   49035-9  
PAP-A MOM:   32123-2  
hCG MOM:   55868-4  
Down Syndrome Risk:   43995-0  
Maternal Age Risk for Down:   49090-4  
Trisomy 18 Risk:   43994-3  
Interpretation:   49588-7  

Warde
Medical
Laboratory