At a Glance
Why Get Tested?
To detect and diagnose some birth defects, genetic diseases, and chromosome abnormalities in a foetus, especially if pregnancy screening tests are abnormal; to help diagnose and monitor haemolytic disease in a foetus
When to Get Tested?
Between 15 and 20 weeks of gestation to test for genetic diseases, chromosome abnormalities, and open neural tube defects; when it is suspected that a foetus has haemolytic disease, about every 14 days
Test Preparation Needed?
You may be instructed to have a full or empty bladder prior to amniocentesis