The objective of the current study was to determine the prevalence of depression among 100 women followed from the first trimester of pregnancy to 9 months after delivery. Mini International Neuropsychiatric Interview, Edinburgh Postnatal Depression Scale and Paykel Life Events Inventory were used. Seventeen per cent of the subjects experienced depression during postpartum, 19.2% started their episode during pregnancy. Psychosocial variables were positively correlated to depression during pregnancy.