Specimen Requirements
Title
Estriol, Serum
Specimen Requirement
0.5 mL serum collected in a red-top tube (no gel)
DO NOT COLLECT SST
Methodology
Stability
Room Temp 24 hours; Refrigerated 7 days
Reference Range
By Report*
Turnaround
2-5 days
Clinical Use
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.
Test Code
ESTRI