Test Directory

7246 Estriol (E3) Unconjugated

Specimen Type
Specimen Stability
Reference Range
Serum
2 Months, Frozen
7 Days,Refrigerated
Ambient - 4 Days
See Report

Specimen Requirements

Specimen Type: Serum
Container: 1 SST Tube
Temperature: Refrigerated
Preferred Vol: 1.00 mL
Min Vol: 0.20 mL

Method

Immunochromatographic Membrane Assay (ICMA)

Schedule

Sunday; Tuesday; Thursday

Turn-Around Time

Send-Out

Instructions/Notes

Separate serum immediately.

Clinical Utility

Unconjugated estriol levels are usually lower than normal in pregnancies when the fetus is small or in poor condition. Maternal estriol levels usually fall dramatically immediately before intrauterine fetal death, reaching very low values shortly afterwards.

CPT Codes

82677

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