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Fetal Fibrinogen Degradation Products (FDP) in Serum/Plasma

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

This test measures the presence of breakdown products from fetal fibrin, which can help assess blood clotting risks in pregnancy.

Quick summary

["Fetal fibrin degradation products help monitor clotting activity during pregnancy."]

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

Key facts at a glance

LOINC
11872-9
Short code
Fet FL/BDP der US
Synonyms
Fet FL/BDP der US
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
us-derived
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 order this test if you have a history of pregnancy complications like miscarriage, preeclampsia, or fetal growth restrictions. It may also be used to evaluate abnormal bleeding or clotting disorders in pregnancy. This test helps identify whether fetal fibrin is breaking down, which can indicate underlying clotting or bleeding risks.

What to Expect Before the Test

No special preparation is needed. You may have a blood draw at your doctor’s office or a lab. The process is quick and typically painless, though you might feel slight discomfort. If you’re pregnant, let your provider know about any medications or conditions that could affect results.

What the Test Results Mean

Elevated levels may suggest abnormal clotting or bleeding during pregnancy. Lower-than-expected levels could indicate other health concerns, but results are interpreted in context with your medical history and symptoms. Your provider will discuss findings with you.

Common Causes of Abnormal Results

High levels might be linked to conditions like preeclampsia, placental abruption, or inherited clotting disorders. Low levels could be due to normal pregnancy physiology or other systemic conditions. Always discuss results with your healthcare team.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

FDP Screening

Frequently asked questions

How often do I need this test?
This test is often done during pregnancy, especially in high-risk cases, but your provider will determine the timing based on your medical needs. It may be repeated if symptoms or test results suggest ongoing risk.
Can I eat or drink before the test?
You can eat and drink normally before the test unless instructed otherwise by your provider. Blood tests don’t require fasting unless measuring substances like glucose or lipids.
Will the test affect my pregnancy?
No, this test is a simple blood draw and does not directly impact your pregnancy. However, if your results are abnormal, your provider may recommend further evaluation or interventions to manage risks.
  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