Prenatal Diagnosis

Prenatal diagnosis is making a diagnosis before birth. Methods for prenatal diagnosis include


of the uterus,


and the developing



Chorionic villus sampling

(CVS) involves getting a sample of the placental tissue, known as chorionic villus. This is tested for chromosomal or

genetic disorders



is used to obtain amniotic fluid from the amniotic sac surrounding the developing foetus. This fluid enables


and enzymes to be tested for genetic and other abnormalities. A growing number of

birth defects

and diseases can be diagnosed prenatally, and in some cases may be treated before birth.

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