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Fetal Liver Diameter Measurement (from Gestational Age)

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

This test measures the size of your baby’s liver during pregnancy to assess fetal development and overall health.

Quick summary

["A fetal liver measurement helps monitor growth and detect potential developmental concerns early."]

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

Key facts at a glance

LOINC
11845-5
Short code
Fet Liver Diam.long.mean Est from GA
Synonyms
Fet Liver Diam.long.mean Est from GA
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
estimated-from-gestational-age
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 higher risk for complications like fetal growth restriction, chromosomal abnormalities, or other conditions affecting fetal development. It’s often part of routine ultrasounds during pregnancy, especially in the second trimester.

What Does the Test Involve?

You’ll undergo an ultrasound, where a special device sends sound waves to create images of your baby’s organs. The technician measures the liver’s longest diameter to compare it with expected fetal growth standards based on your due date.

How Is the Result Interpreted?

Results are compared to standard fetal liver size charts. A measurement outside typical ranges may signal potential issues, prompting further evaluation (e.g., additional ultrasounds, genetic testing, or specialist consultations).

What Are Common Reasons for Abnormal Results?

Abnormal liver measurements could indicate conditions like intrauterine growth restriction, congenital anomalies, or exposure to certain risks (e.g., maternal health conditions). Always discuss findings with your provider for personalized guidance.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Fetal liver size is a critical marker in prenatal care, as it reflects fetal metabolism, organ development, and overall well-being. While not all deviations are urgent, early detection allows for timely interventions to support fetal health.

Short name

Fetal Liver Size Check

Frequently asked questions

Will I need to prepare for this test?
No special preparation is needed, but you may be asked to drink water beforehand to help your bladder stay full for better imaging. Wear comfortable clothing and bring your pregnancy confirmation documents if requested.
How long does the ultrasound take?
The ultrasound itself typically takes 15–30 minutes, but the full exam (including measurements) may extend slightly. Relaxation and patience are key—you can listen to music or rest during the procedure.
Can I get the results immediately after the test?
Results are usually reviewed by your healthcare provider during or shortly after the ultrasound. You’ll receive a follow-up plan based on the findings, which may include additional tests or monitoring.
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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