Screening Tests:
- Nuchal translucency testing- This test uses ultrasoung to measure the clear space in the back of the baby's neck. The measurement along with the mother's age can be used to tell if the baby has DS. This test is usually accurate 80% of the time.
- The triple screen- This takes the mother's age along with substances tested in the mother's blood to predict if the baby has DS.
- A detailed ultrasound- This, in conjunction with blood tests, looks at the baby for physical characteristics associated with DS. It is 60% correct.
Diagnostic Tests:
- Amniocentesis- This pulls a small amount of amniotic fluid from the abdomen. The fluid is then tested for chromosomal abnormalities.
- Chorionic villus sampling (CVS)- This test pulls a tiny sample from the placenta for testing. CVS can be used to test the baby sooner than Amniocentesis but has a better chance for a miscarriage.
- Percutaneous umbilical blood sampling (PUBS)- This takes blood from the umbilical cord to test. Has the same risks as amniocentesis.
While Diagnostic tests are more reliable at 99%, they carry a risk of miscarriage. Screening tests are safer, but less reliable than Diagnostics.
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