[header] How to prevent birth defects [title] Avoid alcohol. [step] Do not drink any beer, wine, liquor or any other form of alcohol during conception or pregnancy. There is no safe amount of alcohol that you can drink during pregnancy, and when a woman drinks, the alcohol passes from her bloodstream into the fetus. 
[substeps] Prenatal exposure to alcohol can cause fetal alcohol spectrum disorders (fasds). One of the most severe of these disorders is fetal alcohol syndrome (fas).