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Syphilis serology with stage-specific interpretation during pregnancy

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

This test measures antibodies to syphilis in your blood to determine your stage of infection during pregnancy, helping guide treatment and monitoring.

Quick summary

Your syphilis test helps doctors determine the best care for you and your baby.

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

Key facts at a glance

LOINC
75180-0
Short code
CLINICALSTAGEOFSYPHILISDURINGPREGNANCY
Synonyms
—
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
cdc-cs
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

Why This Test Is Done During Pregnancy

Syphilis can affect both you and your baby if left untreated. This test helps healthcare providers identify the stage of infection—early, late, or latent—to ensure appropriate treatment and prevent complications. Early detection allows for timely treatment with antibiotics, which can prevent serious harm to your baby.

What the Test Measures

The test detects antibodies (RPR or VDRL) produced by your immune system in response to syphilis bacteria. These antibodies help determine whether you have an active infection and its stage. Some tests may also include confirmatory assays (e.g., FTA-ABS) to confirm the diagnosis.

How the Test Is Performed

A blood sample is taken from a vein in your arm. The sample is sent to a lab for testing. Results are typically reported as a titer (a measure of antibody level) and stage classification (e.g., early, late, or latent syphilis).

What the Results Mean

Results are interpreted in the context of your medical history, symptoms, and other factors. Early syphilis shows lower antibody levels, while latent or late syphilis may indicate higher titers. Your healthcare provider will discuss the findings with you and recommend follow-up care.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Syphilis serology (pregnancy staging)

Frequently asked questions

How long will it take to get my results?
Results are usually available within 1–3 business days, but timing depends on your lab’s processing schedule. Your healthcare provider will contact you once results are ready.
What if I have false-positive results?
False positives can occur due to other infections or past exposures. Confirmatory tests (like FTA-ABS) help rule out false positives. Your provider will guide you on next steps if needed.
Can I treat syphilis at home?
No, syphilis requires medical treatment with antibiotics. Untreated syphilis can cause serious health risks for both you and your baby. Follow your provider’s instructions carefully.
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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 17, 2026. · Read our editorial policy