Test directory: AFP Maternal, Screen

Ordering Code 241
Test Name AFP Maternal, Screen
Alias MSAFP
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 June 1, 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.
FH of Down Syndrome ALL See report.
AFP ALL ng/mL See report.
MOM ALL <2.5
Down Syndrome Risk Assessment ALL See report.
Down Syndrome Age Risk ALL <1:365
Down Syndrome Screen Risk ALL <1:365
NTD Risk Assessment ALL See report.
NTD Screen Risk ALL <1:484
Interpretation ALL See report.