Noninvasive prenatal fetal 18 & 21 aneuploidy panel
This test analyzes small pieces of your DNA found naturally in your blood plasma to check for specific genetic variations that may be linked to certain health conditions or inherited traits.
Helps identify potential genetic markers in your blood for further medical evaluation.
Key facts at a glance
- LOINC
- 77019-8
- Short code
- NIP fet 18+21 aneu pnl Plas.cfDNA Seq
- Synonyms
- NIP fet 18+21 aneu pnl Plas.cfDNA Seq
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- sequencing
- 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
The test looks for specific genetic sequences or mutations in your plasma DNA. These sequences may be associated with inherited conditions, cancer risks, or other genetic factors. The results focus on detecting particular variants (e.g., single nucleotide polymorphisms or structural changes) that may require additional medical assessment.
How the Test Works
Your blood sample is processed to extract plasma DNA. Advanced sequencing technology identifies and compares the genetic sequences against known reference databases to detect the targeted variants. This method is highly sensitive and can detect very small amounts of DNA.
Why It Might Be Ordered
Doctors may recommend this test if you have a family history of genetic disorders, are at higher risk for certain cancers, or if you’re undergoing cancer screening. It can also be used in research or personalized medicine settings to assess genetic predispositions.
What to Expect Before the Test
No special preparation is needed. A simple blood draw is performed, similar to other blood tests. The sample is then sent to a lab for genetic analysis. Results may take several days to weeks, depending on the complexity of the testing.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Identifying specific genetic variants in plasma DNA can help determine an individual’s risk for certain genetic disorders, guide cancer treatment decisions, or inform preventive strategies. While some variants may indicate higher risk, they do not always predict disease definitively. Results should always be interpreted by a healthcare provider in the context of your medical history and symptoms.
Short name
Plasma cfDNA Genetic Screening
Frequently asked questions
What does a positive result mean?
How accurate is this test?
Can this test be used for routine screening?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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