In a cohort of 532 pregnant women from the general population, it was
found by compilation of the results from inter-views, police records,
hospital records and social welfare records that 23 mothers and 51 fat
hers in 64 families (12%) were suffering from alcoholism/heavy drinkin
g. In these 64 families, the mother was an addict in only 13 families,
both parents were addicts in 10 families, and in the remaining 41 fam
ilies only the father was an addict. Pregnancy, delivery, the newborn
child and the child's development until their fourth year of life have
been described using a multidisciplinary approach and a longitudinal
prospective design. An hypothesis on mental and physical development,
and the occurrence of psychopathological symptoms in the children was
tested. None of the children of the 13 alcoholic mothers was born with
foetal alcohol syndrome, but foetal hazard was indicated by lower bir
th weight and a higher rate of perinatal deaths. Children of alcoholic
parents had retarded mental development and showed more behavioural p
roblems until 4 years of age than controls, but the differences relate
d to physical development during the first year of life had then disap
peared. Boys were found to be more vulnerable than girls. The conseque
nces of behaviour seemed to be more pronounced when both parents were
alcoholics. No obvious deviation was found when only the father was ad
dicted. Regarding mental development, it appears that factors related
to parental alcoholism, including genetic and social factors, and the
sex of the child, are of greater importance than the neonatal score on
reduced optimality.