Question

why is it that the chances of having a child with down's syndrome increases if the age of the mother exceedes forty years

Answer 1

Down syndrome can occur at any maternal age, but the possibility increases as a woman gets older. That said, if you have one child with Down syndrome, your chance of having a second child with the condition is about 1 percent for a mother over 40. ... But there is one key risk factor for Down syndrome: maternal age


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