Postnatal depression in first-time mothers: prevalence and relationships between functional and structural social support at 6 and 12 weeks postpartum.

Postnatal depression (PND) is a significant public health issue, with variable prevalence and a dearth of research on risk and protective factors. This quantitative longitudinal study of 512 first-time mothers identified the prevalence of PND and examined the relationships between functional and structural social support at 6 and 12 weeks postpartum. The prevalence of PND was 13.2% at 6 weeks and 9.8% at 12 weeks. At 6 and 12 weeks, the only social support dimension independently associated with PND was total functional social support. At-birth formal structural support and emotional functional support were independently predictive of PND at 12 weeks.