Maternal depression during pregnancy is common. However, reports of the adult offspring with maternal antenatal depression are scarce.

Our aim was to study whether offspring of antenatally depressed mothers have increased risk for substance use disorder when taking account parental mental disorder.

In the Northern Finland 1966 Birth Cohort, the mothers of 12,058 children were asked at the antenatal clinic if they felt depressed. The offspring were followed for over 40 years. Substance use disorders were detected using the Finnish Care Register for Health Care, which was also used for identifying severe mental disorders in the parents till 1984.

Of the mothers, 14% had rated themselves as depressed during pregnancy. Of the parents, 10% had had a hospital-treated mental disorder. The risk for substance use disorder was slightly increased in the offspring of antenatally depressed mothers (crude OR 1.6; 95% CI 1.2–2.1), when compared with the cohort members without maternal antenatal depression. The risk for substance use disorder was higher in the offspring with both maternal antenatal depression and parental mental disorder (2.8; 1.7–4.7) than in those with maternal depression but without parental mental disorder (1.4; 1.1–2.0) or those without maternal depression and with parental mental disorder (1.5; 1.1–2.2). The reference group was cohort members without maternal antenatal depression and without parental mental disorder. The association remained significant after adjustment [1].

Offspring with both maternal depression during pregnancy and parental severe mental disorder have elevated risk for substance use disorder.

The authors have not supplied their declaration of competing interest.