title: Meta-analysis of the role of delivery mode in postpartum depression (Iran 1997-2011).
abstract: BACKGROUND
  Postpartum period is the riskiest time for mood disorders and psychosis. Postpartum depression is the most important mood disorder after delivery, which can be accompanied by mother-child and family relationship disorders. Meta-analysis with the integration of research results demonstrates to investigate the association between the mode of delivery and postpartum depression.
  
  
  METHODS
  This meta-analysis uses the Rosenthal and Robin approach. For this purpose, 18 studies which were acceptable in terms of methodology were selected and meta-analysis was conducted on them. Research instrument was a checklist of meta-analysis. After summarizing the results of the studies, effect sizes were calculated manually and combined based on meta-analysis method.
  
  
  RESULTS
  The findings showed that the amount of effect size (in term of Cohen d) of delivery mode on postpartum depression was 0/30 (P < 0.001).
  
  
  CONCLUSIONS
  Delivery mode on maternal mental health is assessed medium. Meta analysis also indicates moderator variables role, and researcher must focus in these variables.
authors.affiliation: Department of Midwifery, School of Nursing and Midwifery, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Parvin
authors.initials: P
authors.lastname: Bahadoran
authors.affiliation: Department of Psychology, School of Psychology and Educational Sciences, University of Isfahan, Isfahan, Iran.
authors.forename: Hamid Reza
authors.initials: HR
authors.lastname: Oreizi
authors.affiliation: Department of Psychology, School of Psychology and Educational Sciences, University of Isfahan, Isfahan, Iran.
authors.forename: Saeideh
authors.initials: S
authors.lastname: Safari
keywords: Cesarean section; meta-analysis; natural delivery; postpartum depression