Sign in →

Chromosome Analysis, chorionic villi

Collection Requirements

Source: chorionic villus sampling
Container: sterile specimen cup or tube with sterile transport medium
Volume: at least 50 mg of chorionic villus sampling

Special Instructions

  • Transport at room temperature; avoid fluctuating temperatures (hot or cold)
  • Specimen must be processed within 24 hours of collection
  • Contact Genetics for collection materials
  • Use the Prenatal and Pregnancy Loss Cytogenetics Requisition

Turn Around Time

14 days

Availability

Routine

Lab Processing Instructions

Specimen: chorionic villi
Room temperature

Performing Laboratory

Genetics

Adele Hall Lab Section

Cytogenetics

Instrumentation/Methodology

Villi are dissected from maternal decidua followed by cell culture. The cells are processed by exposure to colcemid and hypotonic solution, then fixed. Slides are prepared and GTG banded. Chromosomes analysis and image captured are performed on a computerized imaging system.

Additional Information

Indications for testing: advanced maternal age (>35 years of age); Previous pregnancy with a chromosome abnormality; Parent carrying a known translocation; Abnormal ultrasound findings; Abnormal NIPS

Reference Ranges

See interpretive report

CPT

88267, 88235, 88261