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Test ID: MULT    
Zygosity Testing (Multiple Births)

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

Determining genetic risk for an individual whose twin or 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 or parental interest

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

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

Reflex Tests Lists tests that may or may not be performed, at an additional charge, depending on the result and interpretation of the initial tests.

Test IDReporting NameAvailable SeparatelyAlways Performed
CULFBFibroblast Culture for Genetic TestYesNo
CULAFAmniotic Fluid Culture/Genetic TestYesNo
_STR1Comp Analysis using STR (Bill only)NoNo
_STR2Add'l comp analysis w/STR (Bill Only)NoNo

Testing Algorithm Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

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

Special Instructions Library of PDFs including pertinent information and forms related to the 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.

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

Yes

Reporting Name Lists a shorter or abbreviated version of the Published Name for a test

Zygosity Testing (Multiple Births)

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

Identical Twins
Multiple Births
Triplets
Twins
ZYG