Prevention of recurrent postpartum depression a reasonable option?

Clinical Dilemma: A 27-year-old woman is in the 32nd week of her second pregnancy. After her first childbirth she suffered from postpartum depression (PPD) and was successfully treated with an antidepressant. Since then she has been asymptomatic. Now she asks for consultation whether she should be treated preventively for depression after her upcoming childbirth.