Alpha-Fetoprotein, Maternal - Quad Screen (AFPTRIPLE SCREEN)
|
| Synonyms:
| AFP triple screen; Prenatal Screening for Neural Tube Defect and Down Syndrome |
| Specimen: | Blood; (1) SST (serum separator) or Red (no preservative) top vacutainer tube.
Specimens must be collected between 15 and 22 weeks gestation. Submit completed GGC or LabCorp patient information form with specimen. |
| Volume: | Full primary tube |
| Minimum Volume: | 2 mL serum |
| Collection: | If tube other than an SST is collected, transfer serum to a tightly capped plastic aliquot tube within 2 hours of collection for transport.
Refrigerate at 2-8°C for 6 days; freeze at -20°C for longer storage. |
| Rejection Criteria: | Sample collected prior to 15 weeks and after 22 weeks gestation; plasma sample, improper labeling. |
| Reference Range: | See report |
| Methodology: | |
| Test Use: | Screen for open neural tube defects, abdominal wall defects, and congenital nephrosis. |
| Additional Information: | Always collect prior to aminocentesis; Please complete patient information form to accommodate specimen. |
| Testing Includes: | AFP, human chorionic gonadotropin, unconjugated estriol, Inhibin A.
Specimen normally sent to Greenwood Genetics for testing.
Specimen may be forwarded to LabCorp upon request. |
| Testing Facility: | Greenwood Genetics Center or LabCorp upon request |