Brother-in-law of my wife is a person with intellectual disability. Will our child inherit it?

Patient's question:

No

Doctor's answer:

Hello, the occurrence of intellectual disability is not necessarily due to genetic factors. Many conditions can lead to intellectual disability, such as viral infections during pregnancy, genetic factors, or exposure to radiation during pregnancy, all of which can cause developmental abnormalities in children. If it were solely due to familial genetic factors, this family should not have only one person affected.