Prenatal alcohol exposure affects more children annually than spina bifida, Down syndrome, childhood cancer and childhood diabetes combined — 2 to 5 percent of all
children. Yet, despite it being the leading cause of intellectual disabilities,
it remains an issue often misunderstood by the public.

https://hhs.texas.gov/about-hhs/communications-events/news/2017/03/leading-cause-intellectual-disabilities-preventable