1 x 5 mL light green (mint) top PST tube. Gold top SST tube is also acceptable.
2.0 mL heparinized plasma or serum
Test includes:- Estriol, Unconjugated (E3)- Beta HCG, Quantitative - Blood- AFP
Testing should be performed between 15 to 16 and 5/7 weeks gestation, not earlier.Timing for ultrasound not crucial as calculation takes date into account.
