ml) of absolute alcohol, an AAD of 1 is equivalent to 2 drinks. Both average AAD and AADD were calculated without including an estimate of peri-conceptional drinking. In addition, at the first prenatal visit, the 25-item Michigan Alcoholism Screening Test was administered (MAST; Selzer, 1971). At each visit, the adverse effects of alcohol consumption during pregnancy on the fetus were explained and women were advised to stop or at least reduce their alcohol intake.