Mobile Site ›
Print Friendly View

Test ID: ZYG    
Zygosity Testing (Multiple Births)

Available on the App Store

Secondary ID A test code used for billing and in test definitions created prior to November 2011

81252

NY State Approved Indicates the status of NY State approval and if the test is orderable for NY State clients.

Conditional

Useful For Suggests clinical disorders or settings where the test may be helpful

Determining genetic risk for an individual whose twin/triplet is affected with a genetic disorder for which a specific genetic test is not available (or such testing is uninformative)

 

Assessment of risks prenatally when 1 fetus of multiples is known to be affected by a specific disorder

 

Organ or bone marrow transplantation compatibility testing

 

Familial/parental interest

Genetics Test Information Provides information that may help with selection of the correct test or proper submission of the test request

DNA from twins and their parents is used to determine if the twins are identical or fraternal.

Reflex Tests Lists test(s) that may or may not be performed, at an additional charge, depending on the result and interpretation of the initial test(s)

Test IDReporting NameAvailable SeparatelyAlways Performed
FBCFibroblast Culture for Genetic TestYesNo
AFCAmniotic Fluid Culture/Genetic TestYesNo

Testing Algorithm Delineates situation(s) when tests are added to the initial order. This includes reflex and additional tests.

For prenatal specimens only: If amniotic fluid (non-confluent cultured cells) is received, amniotic fluid culture/genetic test will be added and charged separately. If chorionic villus specimen (non-confluent cultured cells) is received, fibroblast culture for genetic test will be added and charged separately.

Special Instructions and Forms Describes specimen collection and preparation information, test algorithms, and other information pertinent to test. Also includes pertinent information and consent forms to be used when requesting a particular test

Method Name A short description of the method used to perform the test

Polymerase chain reaction (PCR)/microsatellite markers are used to provide a genotype for multiples and their parents to determine if siblings are monozygotic twins.
(PCR is utilized pursuant to a license agreement with Roche Molecular Systems, Inc.)

Reporting Name A shorter/abbreviated version of the Published Name for a test; an abbreviated test name

Zygosity Testing (Multiple Births)

Aliases Lists additional common names for a test, as an aid in searching

Identical Twins
Multiple Births
Triplets
Twins