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Diagnostic Tests during Pregnancy

Amniocentesis

Genetic test - examination of chromosomes in amniotic fluid

Done during the 2nd trimester (weeks 14 and 20)

Recommended if:

woman is 35+

previous child has a chromosomal abnormality

Chorionic Villus Sampling

Genetic test – examination of tissue from the chorion of the placenta

Done during the 1st trimester (weeks 9 and 12)

Recommended if:

Woman is 35+

family history of an identifiable inherited genetic disorder

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