LabCorp
LabCorp and its Specialty Testing Group, a fully integrated portfolio of specialty and esoteric testing laboratories.
Synonyms
Karyotype; Routine G-Banding;
Expected Turnaround Time
7 - 14 days Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Specimen Requirements
Specimen
Whole blood
Volume
5-10 mL (adult); 2-5 mL (child - less for newborn)
Container
Green-top (sodium heparin) tube
Collection
High concentrations of heparin are toxic. Do not collect small volumes in large vacutainers or add additional heparin to specimens.
Storage Instructions
Maintain specimen at room temperature. Do not freeze.
Causes for Rejection
Hemolysis; specimen clotted; use of improper anticoagulant; frozen specimen
Test Details
Use
Evaluate congenital malformations, intellectual disability, growth restriction, infertility, cryptorchidism, hypogonadism, amenorrhea (primary), abnormal/ambiguous genitalia, recurrent miscarriage, Turner syndrome, Klinefelter syndrome, Down syndrome, or other suspected chromosomal disorders.
Pregnancy Week
14-21 Weeks
22+ Weeks
22+ Weeks