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First Trimester Screen

Source Blood
In combination with Nuchal Translucency Ultrasound Screen
Mnemonic FTS
Specimen Requirements This test is not orderable on a CLS requisition; must be ordered on a CHR FTS Referral Form.  

Test is performed in combination with First Trimester Nuchal Translucency Ultrasound Screen provided by Maternal Fetal Medicine, EFW Radiology.
For more information contact the Early Risk Assessment Manager at Teaching, Research and Wellness (TRW) at 943-8379.

1 x 4 mL red top tube, NOT SST
0.5 mL serum
Specimen Handling Centrifuge and pour off serum into aliquot tube prior to transport.    Send in separate bag with CHR FTS Referral Form.
Additional Information

includes:
- PAPP-A
- Beta HCG, Free

Serum testing can only be performed between 8 to 13 and 6/7 weeks gestation.
For testing of 15 to 16 and 6/7 weeks gestation, please see: Maternal Serum Prenatal Screen, Second Trimester

 

Testing Location Immunochemistry
Testing Frequency Weekdays
Alternate Name(s) Maternal Serum Prenatal Screen, First Trimester; Early Risk Assessment; Prenatal Screen, First Trimester; First Maternal Screen
Reference Interval