Trisomy 21

Trisomy 21

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Down syndrome characterized by supernumerary chromosome 21 leading to cognitive delay and characteristic physical signs in the child.

The older the mother is, the greater the risk of having a child with Down syndrome.
Currently, amniocentesis is routinely offered to all women with a family history and those over 37 years of age. It allows the diagnosis of trisomy and if the parents wish the possibility of a termination of pregnancy.