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The ArticleThe risk of having a baby with Down's syndrome is one in 940 for a woman aged 30. But by age 40, the risk rises to one in 85.What's interesting here is that accurate testing has led to the reduction in total cases, indicating that by and large people are more than willing to engage in pre-birth eugenics when it can prevent a crippling disease. Sadly, while this will prevent real-world cases effectively, it's unlikely that it will lower the long-term genetic prevalence of the disorder (there is no selection pressure against older people having children as a result of this, and Down's Syndrome sufferers can rarely procreate themselves). However, as prenatal testing becomes more practical, available, and accurate for a wider variety of crippling disorders, I foresee a coming sharp reduction in general, as people are clearly willing to go down this road.