How harmful is heavy drinking during the first two months of pregnancy?

Alcohol can pass through the placenta from the mothers blood to the babies. It can: cause misscarriage and stillbirth, cause mental retardation, affect the growth of the baby, cause damage to brain and nervous system, the child can be addicted to alcohol, child can also get Foetal Alcohol Syndrome, Brain damage, small head, Low birth weight, abnormalities, can affect language development, Cause short attention span, Behavioral problems (ADHD).