Down Syndrome is not curable. Since it is a genetic disorder, the disorder is already done when the baby is formed in the womb. The baby has contracted or formed a third gene in their chromosome 21. People without Down Syndrome only have two genes in their Chromosome 21. Therefore, it is impossible to take out a gene that formed in them. That can’t be done.
Therefore, it can’t be cured or even prevented because it formed when the baby was formed in the womb. However, there are ways to lessen the risk of having a baby with Down Syndrome. One way is to have children at a younger age. Women in their twenties and early thirties are less likely to have a baby with Down Syndrome.