These are invasive tests to confirm Down’s syndrome, genetic abnormalities and other chromosomal abnormalities. They carry a small risk of miscarriage. The results generally takes about 2-3 weeks to be available.
Once a genetic disorder is diagnosed, genetic counselling is offered, so that the couple can understand the implications of the condition detected.
They are then able to make an informed decision as to whether they intend to carry on with the pregnancy, or what to expect should they decide to proceed on with pregnancy.
1. Chorionic Villus Sampling (CVS): Done as early as 12 weeks of pregnancy, where a small sample of placenta tissue is taken.
2. Amniocentesis:Done usually around 16-20 weeks pregnancy, where a small amount of amniotic fluid surrounding the fetus is sampled.