Estriol, Unconjugated E3 Hormone - Serum
Also Known As
Test Parameters Included
- Serum Unconjugated Estriol (E3) Concentration (pg/mL or nmol/L) - free biologically active estrogen
- Pathologist Endocrinology/Obstetrics Remark - mapped against non-pregnant and pregnancy-trimester-specific reference intervals
Department
Methodology
Sample Required
Preparation
Schedule Report
24 Hours
Emergency Report
Yes
Frequently Asked Questions
Is fasting required for estriol test?
No, fasting is not required for unconjugated estriol measurement. Sample can be collected at any time of day.
Why is estriol measured during pregnancy?
Unconjugated estriol is produced by the placenta and fetal adrenal gland. It is part of the maternal serum screening panel (along with AFP, hCG, and inhibin-A) to assess risk of chromosomal abnormalities such as Down syndrome and neural tube defects.
What does low estriol mean in pregnancy?
Low unconjugated estriol may indicate fetal adrenal insufficiency, placental dysfunction, or increased risk of chromosomal abnormalities. It can also signal poor fetal well-being in the third trimester.
Can estriol be tested outside pregnancy?
Yes, unconjugated estriol can be measured in non-pregnant adults as part of hormonal evaluations, though it is a minor estrogen compared to estradiol and estrone in that context.
How is the report delivered?
Verified PDF report is available within 24 hours via www.drpatholab.in or WhatsApp/Email.
Test Description
Test Code
E15
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