History of premenstrual syndrome and development of postpartum depression: A systematic review and meta-analysis

•PMS may be a risk factor for postpartum depression, but with mixed findings to date.•This study synthesised evidence from papers published in English and Chinese.•From meta-analysis a positive association between the two conditions was identified.•Women with a history of PMS had double the odds of developing postpartum depression.•Good-quality prospective studies are needed to confirm this finding.