| Ordering Code | 298 |
|---|---|
| Test Name | AFP Maternal, Screen (NTD only) |
| Alias | AFP Maternal, Screen (OSB only) MSAFP (NTD only) AFP Maternal, Screen (Neural Tube Defect only) AFP Maternal Screen (Open Spina Bifida only) |
| Preferred Specimen | Serum |
| Preferred Container | SST (Gold) |
| Other Specimen/Container | Serum in Plain (Red) |
| Optimum Volume | 2 mL |
| Collection Instructions | Patient should be between 15 - 20 weeks gestation. |
| Transport Requirements | Oahu: Refrigerated Airline: Frozen |
| Specimen Stability | Ambient: 8 Hours Refrigerated: 2 Days Frozen: 6 Months Frozen samples should be thawed only once. DO NOT use frost-free freezers. |
| Rejection Criteria | Specimen older than stability limits, Grossly hemolyzed, Insufficient quantity |
| Avail. Stat | NO |
| Analytic Time | 1 Day |
| Methodology | Chemiluminescence |
Reference range(s)
The reference ranges listed below are valid on this date of November 5, 2025.
| Component | Age | Male Norm | Male Critical Low | Male Critical High | Female Norm | Female Critical High | Female Critical Low | Units | Add'l info |
|---|---|---|---|---|---|---|---|---|---|
| Gestational Age | ALL | Wks. | See report. | ||||||
| G.A. Based On | ALL | See report. | |||||||
| Age At Term | ALL | Yrs. | See report. | ||||||
| Weight | ALL | lbs. | See report. | ||||||
| Race | ALL | See report. | |||||||
| Gestation | ALL | See report. | |||||||
| Insulin Dependent Diabetic | ALL | See report. | |||||||
| Smoking Status | ALL | See report. | |||||||
| Repeat test | ALL | See report. | |||||||
| FH of NTD | ALL | See report. | |||||||
| AFP | ALL | ng/mL | See report. | ||||||
| MOM | ALL | <2.5 | |||||||
| NTD Risk Assessment | ALL | See report. | |||||||
| NTD Screen Risk | ALL | <1:484 | |||||||
| Interpretation | ALL | See report. |
