Estriol, Serum
Also known as: EST
Use
This test is used as an indicator of fetal well-being and placental function. It serves as a screening test for fetal aneuploidy when used in conjunction with other biomarkers and ultrasonography. Elevated or decreased levels of estriol can provide insights into potential complications during pregnancy and fetal development.
Special Instructions
Patient gestational age is required for accurate interpretation of results. Ensure proper collection and handling of specimens to avoid repeated freeze/thaw cycles.
Limitations
The test may be affected by factors such as improper specimen handling or collection, which could lead to inaccurate results. It is also limited to serum and cannot be performed on plasma samples. Reference intervals vary by gestational age, making it necessary to provide accurate patient information for interpretation.
FDA ApprovedNew York Approved
Methodology
Immunoassay (CLIA)
Biomarkers
LOINC Codes
- 2251-7
Result Turnaround Time
1-2 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1 mL
Minimum Volume
0.6 mL
Container
ARUP Standard Transport Tube
Collection Instructions
Collect serum using Serum Separator Tube (SST).
Storage Instructions
Store refrigerated.
Causes for Rejection
Plasma.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 72 hours |
| Refrigerated | 2 weeks |
| Frozen | 1 year |