Notes

Second trimester screening test for Open Neural Tube Defect (spina bifida) drawn between 15 weeks 0 days and 20 weeks 6 days gestation. This test is appropriate for those women who have already had testing or screening for Down Syndrome or Trisomy 18, either by Chorionic Villus Sampling (CVS) or the Maternal Screen First Trimester. 

The following information is required for test interpretation: Patient's date of birth, current weight, ultrasound date AND measurement, and/or LMP information to date the pregnancy, number of fetuses, patient's race, if patient requires insulin, and if there is a known family history of neural tube defects (NTD). Detection rates: 85% neural tube defects.