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First Trimester Screen

Source Blood
In combination with Nuchal Translucency Ultrasound Screen
Mnemonic FTS
Specimen Requirements

Submit completed REQ9080FTS First Trimester Combined Screen (FTS) Blood Work requisition.

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 or http://www.earlyriskassessment.com/

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 completed REQ9080FTS First Trimester Combined Screen (FTS) Blood Work requisition.
Additional Information

includes:
- PAPP-A
- Beta HCG, Free

Blood should be drawn any time between nine weeks of pregnancy and, preferably, three business days before the ultrasound appointment.
If unable to have blood drawn before the ultrasound appointment, it should be drawn as soon as possible after the appointment.

Serum testing can only be performed between 9 weeks to 13 weeks and 6 days gestation.
For testing of 15 weeks to 20 weeks 6 days gestation, please see: Maternal Serum Prenatal Screen Second Trimester - Blood

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