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Smoking Exposure Assessment During Pregnancy (Qualitative Tobacco Exposure Marker)

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

This test helps evaluate whether you’ve been exposed to tobacco smoke during pregnancy, which may affect your health or that of your baby.

Quick summary

["Screening for prenatal tobacco exposure helps guide support and precautions."]

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

Key facts at a glance

LOINC
106580-4
Short code
Smoking consumption preg
Synonyms
Smoking consumption preg
Category
coagulation
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
0.8
Ref high
1.2
Critical range
— – 5 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
85610
SNOMED
396252006
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 biomarkers in your blood or other bodily fluids that indicate exposure to tobacco smoke. Biomarkers are substances produced in response to exposure, often measured qualitatively (qualitative results indicate presence vs. absence).

Why It Matters During Pregnancy

Tobacco exposure during pregnancy can pose risks to both mother and baby, including increased chances of preterm birth, low birth weight, or developmental issues. Identifying exposure helps healthcare providers recommend smoking cessation support or protective measures.

What to Expect Before the Test

No special preparation is needed. You may provide a blood sample (serum/plasma), saliva, or other fluid depending on the test method. Always follow your healthcare provider’s instructions for specimen collection.

What the Results Mean

Results are qualitative (positive or negative). A positive result suggests recent or ongoing exposure to tobacco smoke. Discuss these findings with your provider to explore next steps, such as smoking cessation programs or monitoring.

Reference range

INR: 0.8-1.2 (warfarin: 2.0-3.0)N/A

Specimen: serum

Inform your healthcare provider if you are taking blood thinners. No special preparation required.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Tobacco Exposure Screening (Pregnancy)

Frequently asked questions

How soon after exposure will the test detect it?
Biomarkers may reflect recent exposure within days to weeks, depending on the specific marker used. Some tests detect exposure more broadly, while others focus on acute or recent exposure patterns. Your provider will clarify timelines based on the test type.
Can this test replace a full smoking history assessment?
No, this test provides a snapshot of exposure but doesn’t replace a detailed smoking history. Healthcare providers use these results alongside patient reports to tailor support and interventions.
What if my results are positive?
A positive result means you’ve been exposed to tobacco smoke. Your provider will work with you to develop a plan to quit smoking safely, including counseling, support groups, or medications if needed. Addressing exposure early can improve both your and your baby’s health outcomes.
  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