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Does a family history of Down syndrome in a relative other than the woman/partners child increase the risk of having a baby with Down syndrome?

April 26, 2017baby child down syndrome family history increase partners relative risk woman

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Does a family history of Down syndrome in a relative other than the woman/partners child increase the risk of having a baby with Down syndrome?

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If the karyotype of the affected family member (other than child) is 47,XX, +21 or 47, XY, +21, the woman is not at increased risk of having a pregnancy with Down syndrome.