Having a child with a developmental disorder can cause parents to worry about the outcome of further pregnancies. In cases where the genetic mutation causing the disorder is not present in either parent, it is assumed to be a one-off event with a very small chance of recurrence. But in some families, the risk of having another affected child is as high as 50 percent. Identifying such high-risk families and providing an accurate assessment of their chances of having a unaffected child is therefore a high priority for clinical geneticists.
* This article was originally published here
