U.S. flag

An official website of the United States government

GTR Home > Tests > 5-Cell Confirmation Chromosome Analysis, Amniotic Fluid

Performance Characteristics



  • Entire test performed in-house

Analytical Validity


Minimal band resolution is 425 bands. This test analyzes 5 metaphase cells to identify numerical and/or structural chromosome abnormalities.


Not provided

Assay Limitation(s)


Mosaicism likely will not be detected.

Proficiency Testing (PT)

Is proficiency testing performed for this test? Help
Method used for proficiency testingHelp
Formal PT program
PT ProviderHelp
College of American Pathologists, CAP

FDA Regulatory Clearances of the Test

FDA Category Designation
Not Applicable

Practice guidelines

  • NSGC, 2021
    National Society of Genetic Counselors Position Statement: Prenatal Cell-Free DNA Screening

Consumer resources

IMPORTANT NOTE: NIH does not independently verify information submitted to the GTR; it relies on submitters to provide information that is accurate and not misleading. NIH makes no endorsements of tests or laboratories listed in the GTR. GTR is not a substitute for medical advice. Patients and consumers with specific questions about a genetic test should contact a health care provider or a genetics professional.