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Phenotypic pregnancy screening (qualitative protein/phenotype analysis)

Published: August 9, 2026Updated: August 17, 2026

This test evaluates certain biochemical or genetic markers to help assess pregnancy-related conditions, such as potential protein abnormalities or early pregnancy indicators.

Quick summary

["It supports early detection of conditions that may affect pregnancy outcomes."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
64708-1
Short code
Number pregnancy PhenX
Synonyms
Number pregnancy PhenX
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Critical range
0.5 N/A – —
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
phenx
CPT
86592
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

What This Test Measures

This test detects specific biochemical or phenotypic changes associated with pregnancy, often involving protein analysis. It may include qualitative screening for substances like hCG (human chorionic gonadotropin) or other pregnancy-specific markers, though the exact method can vary. Some tests may also assess metabolic or genetic traits relevant to pregnancy health.

How the Test Works

The test uses a qualitative immunoassay or similar method to identify the presence or absence of specific proteins or substances linked to pregnancy. Results are typically reported as positive or negative rather than quantitative values.

Why It’s Ordered

Your healthcare provider may order this test if you are pregnant or planning pregnancy and suspect conditions like protein abnormalities, early pregnancy complications, or genetic markers that could impact fetal development.

What to Expect

You will likely provide a blood sample (serum or plasma) for this test. The results are usually available within a few days. Follow-up may include additional testing if needed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

What does a positive result mean?
A positive result indicates the presence of the targeted pregnancy markers or biochemical traits, which may suggest normal pregnancy progression or specific conditions requiring further evaluation by your healthcare provider.
Will I need to prepare for this test?
No special preparation is needed, but avoid heavy meals or alcohol before the test. Follow your provider’s instructions if you are taking any medications.
How often will I need this test?
This test is typically ordered once during pregnancy screening or as part of a specific diagnostic evaluation. Your provider will determine if repeat testing is necessary based on your clinical needs.
  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 17, 2026. · Read our editorial policy