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Fetal Fetal Fibrinogen Degradation Products (FDP) Screening in Serum

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

This test measures a substance produced when blood clots break down, which can help detect early signs of abnormal clotting or bleeding risks in fetal circulation.

Quick summary

["This screening helps monitor blood clot stability during pregnancy."]

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

Key facts at a glance

LOINC
95940-3
Short code
Fet BPD US Prctl per est GA
Synonyms
Fet BPD US Prctl per est 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
per-estimated-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 This Test Is Done

Your healthcare provider may recommend this test if you have a history of pregnancy complications related to blood clotting, such as miscarriage, preterm labor, or fetal growth issues. It may also be part of routine monitoring in certain high-risk pregnancies to assess fetal well-being.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample from a vein, typically in a clinic or lab. The process takes a few minutes, and you may feel slight discomfort but no pain.

What the Test Measures

The test detects fetal fibrin degradation products (FDPs), which are fragments released when fibrin (a protein involved in blood clotting) breaks down. Elevated levels may indicate abnormal clot formation or bleeding in the fetal-placental circulation.

What the Results Mean

Results are qualitative (positive/negative) rather than numeric. A positive result suggests potential concerns that may require further evaluation, such as additional imaging tests or closer monitoring.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

FDP Screening

Frequently asked questions

What does a positive result mean?
A positive screening result may signal an increased risk of conditions like fetal thrombotic events or placental insufficiency. Your provider will discuss next steps, which could include additional tests (e.g., Doppler ultrasound) or closer prenatal care.
Could this test affect my pregnancy plans?
Not directly. This screening is a monitoring tool, not a definitive diagnosis. If results are concerning, your provider will tailor follow-up based on your specific situation, such as adjusting care plans or recommending further testing.
How often will I need this test?
The frequency depends on your risk profile. Some providers may recommend it once during pregnancy, while others may repeat it if risk factors persist or if other tests show abnormalities.
  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