If the test results show that I am at increased risk, what are my options?
Patients who are at increased risk should speak with their physician or a genetic counsellor. They will be offered the option of a non-invasive prenatal test free of charge before proceeding with an invasive diagnostic test. Your physician will also discuss with you the possibility of having a chorionic villus sampling (CVS) test or an amniocentesis. These are diagnostic tests that can definitively determine if your pregnancy is associated with a trisomy. However, these invasive tests can cause pregnancy complications or miscarriage.
What is the HarmonyTM Prenatal Test?
The HarmonyTM Prenatal test is a non-invasive prenatal test (NIPT) for the detection of trisomy 21, 18 and 13. It also offers the option of detecting sex chromosome aneuploidies and the sex of the fetus. The HarmonyTM Prenatal Test is based on the newest advances in non-invasive prenatal testing. It is a simple and safe blood test that has been shown in clinical studies to detect the risk of fetal trisomies with high accuracy. The HarmonyTM Test has been shown to have detection rates of up to 99% and false positive rates as low as 0.1% for trisomy 21, 18 and 13. It is recommended that all high risk results following a HarmonyTM test are confirmed by a diagnostic test. To view the HarmonyTM test brochure, click here.
What is CVS*?
Chorionic villus sampling (CVS) is a procedure that takes a small amount of tissue from the developing placenta. The tissue is then sent to a laboratory to test the chromosomes. CVS is typically performed between 10 and 12 weeks of pregnancy. This invasive test has an associated risk of pregnancy complications or miscarriage.
What is amniocentesis*?
Amniocentesis is a procedure that withdraws a small amount of fluid that surrounds the fetus. The fluid is then sent to the laboratory to test the chromosomes. An amniocentesis is usually performed around or after the 15th week of pregnancy. This invasive test has an associated risk of pregnancy complications or miscarriage.
Genetic Counselling Services
Dynacare offers genetic counselling services to support both patients and physicians by identifying genetic risks, explaining appropriate genetic testing options, discussing the implications of the test results, and helping patients make better healthcare decisions. Genetic counselling is included in the price of Prenatest® services. Contact us to speak to a genetic counsellor.
*Dynacare does not offer these diagnostic tests.