Casandra
Casandra Test Code QD33159Version 1 (DRAFT)
Performing Lab
Fragile X DNA Analysis, Fetus
Also known as: FRAX, Fragile X Syndrome (FXS), Fra(X), Martin-Bell Syndrome, FMR1
Clinical Use
Order TestUse
Not provided.
Special Instructions
Not provided.
Limitations
Not provided.
Test Details
Methodology
PCR-based (PCR)
Biomarkers
FMR1
GeneCGG repeat • Mutation • Categorical (e.g., Positive / Negative / Indeterminate)
Result Turnaround Time
Not provided.
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Amniotic Fluid
Volume
10 mL
Minimum Volume
10 mL
Container
sterile, plastic, leak‑proof container
Collection Instructions
Do not hold specimen; forward to laboratory when specimen arrives. Call 1‑866‑GENE‑INFO prior to submission. Documentation of parental carrier status must be provided. Maternal Cell Contamination Study, STR Analysis must be ordered with separate maternal EDTA tube.
Storage Instructions
Store and ship at room temperature; do not refrigerate or freeze
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 48 hours |
| Refrigerated | Unacceptable |
| Frozen | Unacceptable |
Related Tests
Other tests from different labs that may be relevant
Fragile X (FMR1) with Reflex to Methylation Analysis, Fetal
ARUP Laboratories
Prenatal Fragile X Syndrome (FMR1 repeat analysis)
GeneDx
Fragile X Syndrome, Molecular Analysis, Varies
Mayo Clinic Lab
FMR1 CGG Repeat Expansion Prenatal Analysis
Baylor Genetics
FMR1 CGG Repeat Expansion Analysis
Baylor Genetics
Fluorescence in situ Hybridization (FISH), Prenatal Aneuploid Evaluation, Chorionic Villus Sampling With Reflex to Microarray or Chromosome Analysis
Labcorp
Chromosome FISH, Amniotic Fluid with Reflex to Chromosome Analysis or Genomic Microarray
ARUP Laboratories