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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