Which Parent Does Down Syndrome Come From?

The best person to answer a question about Down syndrome is a person with Down syndrome. Dylan answers this one.


Science has shown inconclusively that Down syndrome could occur from either side of a child’s birthparent’s gene pool.

Some studies have shown that maternal age is a factor in the likelihood of having a child with Down syndrome, especially after the age of 35. However, new studies have shown that paternal age can also be a factor.

That said, most children with Down syndrome are born to women younger than 35.

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