"Alcohol is a potent teratogen with a range of negative outcomes to the fetus, including low birthweight, cognitive deficiencies, and fetal alcohol disorders.15"
Source
Anderson, P., Chisholm, D., & Fuhr, D. C. (2009). Effectiveness and cost-effectiveness of policies and programmes to reduce the harm caused by alcohol. Lancet (London, England), 373(9682), 2234–2246. doi.org/10.1016/S0140-6736(09)60744-3