Test directory: Chromosome, Amniotic Fluid

Ordering Code 8331
Test Name Chromosome, Amniotic Fluid
Alias Karyotype, Amniotic Fluid
Preferred Specimen Amniotic fluid, fetal urine OR cystic hygroma fluid
Preferred Container Sterile plastic conical tube
Optimum Volume 20-30 mL (15-20 mL for early amniocentesis)
Collection Instructions Discard first 2 mL of fluid aspirated to avoid maternal cell contamination. Specimen is collected in a 20 mL sterile syringe and transferred aseptically to sterile tubes to be transported to LabCorp. Request form is completed and accompanies specimen and miscellaneous slip to the laboratory.
Handling Instructions If prior NIPT studies have been performed, include copy of the report
Do NOT freeze.
Transport Requirements Oahu: Ambient
Airline: Ambient
Rejection Criteria Specimen found not to be amniotic fluid, Gross contamination with blood cells, Frozen specimen,
Containers with rubber stoppers (rubber is toxic to amniocytes)
Avail. Stat NO
Analytic Time 11 - 14 Days
Methodology In situ cell culturing of amniocytes to investigate numerical and/or structural chromosome abnormalities
Reference Lab  Esoterix Genetic Laboratories, LLC

Reference range(s)

The reference ranges listed below are valid on this date of November 6, 2025.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Cells Analyzed ALL See report.
Cells Counted ALL See report.
Cells Karyotyped ALL See report.
Colonies ALL See report.
Cytogenetic Diagnosis ALL See report.
Cytogenetic Interpretation ALL See report.
Director Review: ALL See report.
GTG Band Resolution Achieved ALL See report.
PDF ALL See report.
Specimen Type ALL See report.