How long does the test take?
This depends on the sample being tested and may take between 10 - 14 working days to obtain a result.

What type of samples are required?
DNA can be obtained from almost any human tissue, however for microarray CGH testing we require a venous blood sample. If prenatal testing is to be performed, a specialist Dr is required.

Is the sample collection painful?
There may be some mild discomfort when invasive sampling procedures are required, such as venous blood, or prenatal sampling (amniotic fluid or chorionic villus).

What if I am worried about how my test is going?
Most patients find it difficult waiting for the result of the chromosome test. We understand that you may be anxious about your result, particularly if it is a prenatal test. We understand that it is even harder when your doctor has found a problem with your baby on ultrasound. Sydney Genetics welcomes you to make contact if you are concerned about your test. Please feel free to contact the laboratory on (02) 9229 6444.

What if the test is abnormal?
Your doctor will contact you to discuss the result, who will be able to explain to you what the abnormality means and arrange genetic counselling for you if needed.

Is the result always correct?
In almost all cases the result is correct. However, for most scientific and medical tests there is a small risk of an abnormal result when there is not really an abnormality (false positive). There is also a small risk of getting a normal result when there is really an abnormality (false negative).

What if the test fails and there is no result?
It is extremely rare for a test to fail at Sydney Genetics. The chance of this happening in our laboratory is less than 1 in 1,000. We would advise your doctor if you need to have the test repeated.

Will you destroy my DNA once testing is complete?
No, we would normally keep your DNA for quality purposes and in the event, you or your doctor, request that it be tested again. WE DO NOT test your DNA, or allow it to be tested, for anything other than what has been requested.