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FREST / 004614L
ESTRIOL, FREE, SERUM

Test Code FREST / 004614L 
Test ESTRIOL, FREE, SERUM 
Methodology Immunochemiluminometric Assay (ICMA) 
Description Useful in the evaluation of fetal distress and placental function in the management of patients facing complications 
Specimen Draw blood in a plain red-top or serum gel tube. Spin down and send 1.0 mL (minimum volume: 0.3 mL - does not allow for repeat testing) of serum refrigerated in a plastic, screw-capped vial.

NOTE: State weeks of gestation on the test request form. 

Reference Values Gestation:
Week 27: 2.9 - 12.7 ng/mL
Week 28: 3.3 - 14.3 ng/mL
Week 29: 3.7 - 16.0 ng/mL
Week 30: 4.1 - 17.9 ng/mL
Week 31: 4.6 - 19.9 ng/mL
Week 32: 5.1 - 22.1 ng/mL
Week 33: 5.7 - 24.4 ng/mL
Week 34: 6.3 - 27.0 ng/mL
Week 35: 7.0 - 29.7 ng/mL
Week 36: 7.7 - > 30 ng/mL
Week 37: 8.5 - > 30 ng/mL
Week 38: 9.3 - > 30 ng/mL
Week 39: 10.2 - > 30 ng/mL
Week 40: 11.1 - > 30 ng/mL 
Analytic Time 2 Days 
Day(s) Test Set Up Monday through Friday 
CPT Code(s) 82677