Estriol, Serum
Test ID:
704210
CPT code:
82677
Synonyms:
E3
Pregnancy, Estriol
Unconjugated Estriol
Clinical Use:
Evaluate fetal distress and placental function in the management of patients facing complications such as preëclampsia, fetal growth retardation, diabetes, Rh immunization, choriocarcinoma, and hydatidiform mole. May be elevated in hydrops fetalis in the presence of a dying fetus. May be low in the presence of a living anencephalic fetus.
Specimen Type:
Serum
Requested Volume:
1 mL
Minimum Volume:
0.3 mL (Note: This volume does not allow for repeat testing.)
Container Type:
Red-top tube or gel-barrier tube
Collection:
If a red-top tube is used, transfer separated serum to a plastic transport tube. All specimens should be drawn at the same time of day to allow comparison of values.
Storage Instructions:
Refrigerate
Stability Requirements:
Temperature |
Period |
---|---|
Room temperature |
14 days |
Refrigerated |
14 days |
Frozen |
14 days |
Freeze/thaw cycles |
Stable x3 |
Rejection Criteria
Plasma specimen
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