Prenatal Tests

These tests are screening tests and indicate an increased risk only, they are often combined and referred to as First Semester Screening:

Early Ultrasound or Nuchal Transulency - http://www.kemh.health.wa.gov.au/health/fetal_monitoring/nuchal.htm

Maternal Serum Screening Test (MSS or Triple Test) - www.health.vic.gov.au/maternitycare/tests.pdf

These tests are diagnostic, although there are some risks involved in these procedures:

Amniocentesis - http://www.kemh.health.wa.gov.au/health/fetal_monitoring/amnio.htm

Chronic Villus Sampling - http://www.kemh.health.wa.gov.au/health/fetal_monitoring/cvs.htm

Articles and Information

Prenatal Testing for Down Syndrome by Dr Len Leshin

Incidence of Down Syndrome and maternal age - charts 

Resources

DeCrespigny, Lachlan and Rhonda Dredge  Which Tests for my Unborn Baby? : Ultrasound and Other Prenatal Tests

DeCrespigny, Lachlan  Prenatal Testing : Making Decisions in Pregnancy