Controlled prospective study of postpartum mood disorders: comparison of childbearing and nonchildbearing women.

A controlled prospective study was undertaken to determine the extent to which pregnancy and the puerperium are associated with increased risk for minor and major depression, depressive symptom-atology, and poor social adjustment. A large sample of childbearing (CB) women were recruited during the second trimester of pregnancy along with an equal sized, matched sample of nonchild-bearing (NCB) women. Ss were assessed multiple times during pregnancy and after delivery by questionnaire and through personal interview on measures of depression and other mood states and marital and social adjustment. There were no differences between CB and NCB Ss with respect to rates of minor and major depression during pregnancy or after delivery. However, CB women experienced significantly higher levels of depressive symptomatology and poor social adjustment than NCB women during late pregnancy and the early puerperium.

The effects of maternal mood on mother-infant interaction.

The effects of depressed mood on mother-infant interaction were studied in 30 mother-infant dyads using the Velten mood induction procedure. It was predicted that maternal depressed mood would induce dysphoria in the infants, disrupt the infants' natural responsiveness to their mothers, and interfere with the mothers' ability to manage the interaction. In addition, it was predicted that such deficits would be the result of depressed maternal mood and not simply due to any change in maternal mood. The results indicated that the infants were sensitive to depressed mood and were less contingently responsive to their mothers than were controls. Also, mothers in the depression induction condition were less successful in eliciting positive responses from their infants than were controls. These results have implications for the development of a helplessness vulnerability in infants and for the two-way direction of effect present in depressed mother-infant dyads.