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Published: August 9, 2026Updated: August 16, 2026

This test measures the level of 17-hydroxycorticosteroids in the amniotic fluid surrounding the baby during pregnancy.

Quick summary

{"Measures cortisol breakdown products in amniotic fluid","Helps assess fetal adrenal gland function","Used to evaluate fetal well-being in high-risk pregnancies","Guides diagnosis of certain fetal adrenal disorders","Performed through amniocentesis procedure"}

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
1664-2
Short code
17OHCS Amn-mCnc
Synonyms
17OHCS Amn-mCnc
Category
chemistry
Sample
fluid
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
2-5 mL
Stability
Room temperature: 2h, Refrigerated: 24h
Hemolysis max
300
TAT
4–24 hours
Order
routine

What exactly is this medical test, and what specific health markers does it measure?

The 17-Hydroxycorticosteroids (17-OHCS) in Amniotic Fluid test measures the amount of cortisol metabolites in the amniotic fluid. Cortisol is a hormone produced by the adrenal glands that plays a crucial role in metabolism, stress response, and fetal development. This test evaluates how well the fetal adrenal glands are functioning by measuring the breakdown products of cortisol that pass into the amniotic fluid.

Why is this test performed by your healthcare provider and what conditions can it detect?

This test is primarily performed to assess fetal adrenal gland function. It may be ordered when healthcare providers need to evaluate fetal well-being in high-risk pregnancies, such as those with suspected fetal growth restriction, preeclampsia, or when there are concerns about fetal adrenal development. The test can help detect conditions affecting the fetal adrenal glands, including adrenal insufficiency or certain genetic disorders that impact cortisol production.

How is the sample collected for this test, and do you need to fast beforehand at the lab?

The sample is collected through a procedure called amniocentesis. During this procedure, a thin needle is inserted through the abdominal wall into the uterus to withdraw a small amount of amniotic fluid. The procedure is typically performed under ultrasound guidance to ensure safety. Although amniocentesis carries a small risk of complications (such as infection or miscarriage), it is considered a safe procedure when performed by experienced healthcare providers.

What do the results of this test mean for your overall health and ongoing treatment plan?

Abnormal levels of 17-hydroxycorticosteroids in amniotic fluid may indicate fetal adrenal gland dysfunction. Low levels might suggest adrenal insufficiency or underdeveloped adrenal glands, while very high levels may indicate conditions causing excessive cortisol production. Your healthcare provider will interpret the results in conjunction with other clinical findings, ultrasound results, and the overall pregnancy status to determine appropriate management.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

The 17-Hydroxycorticosteroids test in amniotic fluid serves as an important indicator of fetal adrenal function. It helps healthcare providers assess fetal well-being in complicated pregnancies and can guide clinical decisions regarding pregnancy management. The test is particularly valuable in detecting fetal adrenal hypoplasia, anencephaly (where fetal adrenal glands may be underdeveloped due to lack of pituitary stimulation), and other disorders affecting the hypothalamic-pituitary-adrenal axis. Results from this test, combined with other diagnostic tools, help clinicians provide appropriate monitoring and intervention for high-risk pregnancies.

Frequently asked questions

Is this test safe for my baby?
Amniocentesis, the procedure used to collect the amniotic fluid, carries a small risk of complications (approximately 1 in 300-500 may experience miscarriage). However, when performed by experienced specialists, it is generally considered safe. The benefit of obtaining crucial information about your baby's health often outweighs the small associated risk.
How long does it take to get results?
Results from 17-OHCS testing in amniotic fluid typically take several days to a week, as the test requires specialized laboratory analysis. Your healthcare provider will contact you with the results as soon as they are available.
Will I need to repeat this test?
Whether repeat testing is needed depends on your specific clinical situation. Your healthcare provider will determine if follow-up testing is necessary based on the initial results, your pregnancy progression, and other diagnostic findings.
What happens after getting the results?
Your healthcare provider will discuss the results with you and explain what they mean for your pregnancy. If abnormal levels are detected, you may be referred to a maternal-fetal medicine specialist for further evaluation and management. Additional testing or more frequent monitoring may be recommended based on the findings.
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy