Between 1% and 5% of children (11.3 to 50 per 1,000 children) in the United States may be affected by fetal alcohol spectrum disorders (FASD), and the rate of FASD varies across geographic regions. Previously the prevalence of FASD was estimated at a rate of 10 per 1,000 children (affecting 1% of children); however, this estimate was derived from studies with small sample sizes. These estimates were reported in “Prevalence of Fetal Alcohol Spectrum Disorders in 4 US Communities” by Philip A. May, Ph.D.; Christina D. Chambers, Ph.D., MPH; and Wendy O. Kalberg, MA; et . . .