International Fetal Alcohol Spectrum Disorders (FASD) Awareness Day, recognized every year on the ninth day of the ninth month, is an important reminder that prenatal alcohol exposure is the leading preventable cause of birth defects and developmental disorders in the United States. Almost 40 years have passed since we recognized that drinking during pregnancy can result in a wide range of disabilities for children, of which fetal alcohol syndrome (FAS) is the most severe. Yet up to 30 percent of women report drinking alcohol during pregnancy.