Important Note

Please accompany sample with Iowa Maternal Screen Test Request Form.

First trimester screening test for DS and T18, drawn between 10 weeks 0 days and 13 weeks 6 days gestation when Crown Rump Length (CRL) is 32-80 mm.

Incorrect information, especially incorrect dating, will result in inaccurate risk assessment.  Requires nuchal translucency (NT) measurement by sonographer certified by FMF or NTQR.  The sonographer's name, certification number, and certifying organization must be on file with the laboratory to submit an NT measurement.  Call 319-335-4056 the first time a sonographer is submitting an NT measurement with a test request.  If NT is unobtainable, order Integrated Screen.  The following information is required for test interpretation: Ultrasound date AND crown rump length (CRL) measurement, an NT measurement obtained between 10 weeks and 13 weeks 6 days, patient's date of birth, current weight, patient's race, and for IVF pregnancies, the age of the egg donor at time of egg retrieval.  This test cannot be performed on multiples.  Detection rates: 83% Down Syndrome, 80% Trisomy 18 False positive rate: 5%.  Note: if this test is performed, it is recommended that a NTD screen be ordered in the second trimester.