Smoking and alcohol consumption by Flemish pregnant women, 1966-83.

Between 1966 and 1983 the percentage of women who smoked or consumed alcohol during pregnancy increased considerably. Tobacco use was negatively, and alcohol consumption positively, correlated with the mother's level of education. Markedly more adolescents than older women smoked during pregnancy. Beer, wine and liquor consumption were highest among older pregnant women. The majority of women did not alter their smoking and drinking behaviour during their successive pregnancies.