Screening test for open neural tube defects, Down syndrome, and Trisomy 18.
Serum integrated screening requires two specimens; one collected in the first trimester and one in the second trimester. This test number is for the second trimester portion of the test.
Collect between 15.0 and 21.9 weeks of gestation.
Spin; pour-off/aliquoting is not advised
Gold serum separator (SST) tube
Ambient (preferred) - 7 days
Refrigerated - 14 days
Frozen - 14 days
A positive result means that diagnostic testing may be offered to the pregnant woman to determine if a neural tube defect or chromosome abnormality is present.