Is Mosaic Down syndrome hereditary?

Like trisomy 21, mosaic Down syndrome is not inherited. It occurs as a random event during cell division early in fetal development.

Can a Down syndrome child look normal?

Some of the children with Mosaic Down syndrome that we know do not actually look as if they have Down syndrome – the usual physical features are not obvious. This raises some important and difficult social issues and identity issues for both parents and children, which parents have discussed with us.

Is Mosaic Down syndrome a disability?

While people with mosaic Down syndrome often suffer from many of the same additional physical impairments that people with non-mosaic Down syndrome suffer from, the SSA does not have a specific disability listing for mosaic Down syndrome. A diagnosis of mosaic Down syndrome alone is not enough to qualify for benefits.

Can Down syndrome be missed in pregnancy?

This means that one or two out of 10 pregnancies with Down syndrome are missed (classified as screen negative).

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