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Fetal Albumin (Serum or Plasma Concentration)

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

This test measures the amount of albumin, a protein found in both maternal and fetal blood, to assess fetal well-being during pregnancy.

Quick summary

["Helps monitor fetal health by tracking albumin levels in maternal blood."]

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

Key facts at a glance

LOINC
11794-5
Short code
Fet AV Diam US.meas
Synonyms
Fet AV Diam US.meas
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
us-measured
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your healthcare provider may order this test if you’re at risk for complications like preterm labor, placental issues, or if you have conditions like preeclampsia. Albumin levels can also be checked during routine prenatal care to ensure fetal development is progressing normally.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. If you’re pregnant, this test is typically done in a clinic or hospital setting.

What Are Possible Results?

Results are interpreted by your healthcare provider based on your specific medical situation. High or low levels may indicate underlying health concerns that need further evaluation.

How Is This Test Performed?

A healthcare professional will collect a small amount of blood from a vein in your arm using a needle. The blood is then sent to a lab for analysis using an immunoassay method to measure albumin concentration.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Fetal Albumin Level

Frequently asked questions

What does a low fetal albumin level mean?
A low fetal albumin level may signal potential issues with placental health or blood flow to the fetus. Your healthcare provider will discuss next steps, which could include additional monitoring or interventions like bed rest or medication.
The frequency depends on your pregnancy risk factors. Some women may have this test once or twice during pregnancy, while others with higher risks might have it more often, such as weekly or biweekly.
Dietary factors like protein intake may indirectly influence albumin levels, but direct effects on fetal albumin are less common. Medications should be discussed with your provider, as some may affect blood chemistry or pregnancy outcomes.
Is there any pain or discomfort from this blood test?
You may feel a slight pinch when the needle is inserted, but most people describe it as mild discomfort. The area may sting briefly afterward, but it’s usually over quickly. Ice can help reduce any swelling or discomfort.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

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