Who does Edwards syndrome (trisomy 18) affect?

Who does Edwards syndrome (trisomy 18) affect?

Edwards syndrome (trisomy 18) can affect anyone. The condition occurs when a person has an extra copy of chromosome 18, which is random and unpredictable. The likelihood that a parent will have a child with Edwards syndrome (trisomy 18) increases with maternal age at the time of pregnancy. If a parent had a child with Edwards syndrome (trisomy 18) and becomes pregnant again, it’s unlikely they’ll have another child diagnosed with the same condition (no more than 1%).