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Prenatal maternal serum/plasma free amino acids profile (qualitative screening)

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

This test measures certain amino acids in your blood to help monitor your health and the health of your developing baby during pregnancy. It may be used to check for conditions like metabolic disorders or to assess nutritional needs.

Quick summary

["This screening helps ensure your baby’s growth and development are supported by proper nutrition."]

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

Key facts at a glance

LOINC
85718-5
Short code
Prenatal care location Mother
Synonyms
Prenatal care location Mother
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 This Test Is Done

Your healthcare provider may recommend this test if you have a history of metabolic disorders, certain genetic conditions, or if you’re at higher risk for complications during pregnancy. It can also be part of routine prenatal care to monitor overall health and detect any imbalances early.

What to Expect Before the Test

You’ll typically have a small blood draw from a vein in your arm. The process is quick and usually doesn’t cause discomfort. No special preparation is needed, but you may be asked to fast for a few hours before the test if instructed by your provider.

What the Test Measures

This test screens for a range of amino acids in your blood, which are essential building blocks for your body and baby’s growth. Abnormal levels may indicate metabolic issues or other health concerns that need further evaluation.

What the Results Mean

Results may show normal levels of amino acids or indicate potential imbalances. If abnormalities are found, your provider may recommend additional testing or adjustments to your diet or treatment plan.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Prenatal Amino Acid Screen

Frequently asked questions

How long will I need to wait for my results?
Results are usually available within a few days to a week, depending on your healthcare provider’s lab processes. Your provider will discuss the findings with you during your next prenatal visit.
Can I eat or drink before this test?
No special diet is required, but always follow your provider’s instructions. If fasting is required, avoid food and liquids (except water) for a specified period before the blood draw.
What if my results show an abnormality?
If your results suggest an amino acid imbalance, your provider may order further testing or recommend dietary changes, supplements, or referrals to a specialist for additional evaluation.
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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