Purpose: Perinatal stress is associated with adverse pregnancy outcomes for both the mother and child. This presentation highlights the findings from a quantitative systematic review that critically appraise, synthesize and critique the best available evidence on the effective of mindfulness training on perinatal mental health. Methods: This review was conducted according to the Joanna Briggs Institute's (JBI) systematic review strategies. Studies that included pregnant women of any age and at any time during the antenatal period were considered. The intervention of interest was mindfulness training, as defined by the authors. A range of quantitative research designs were considered for inclusion. The primary outcome of interest was perinatal mental health. Nine electronic databases were searched for studies published in English from 1980 to 2014. Two reviewers independently assessed all the papers for inclusion. Relevant studies were then appraised and data extracted by two reviewers using the standardized critical appraisal in struments and data extraction tools from the JBI Meta-Analysis of Statistics Assessment and Review Instrument (JBI- MAStARI). Results: Seven studies were included in this review from the 698 papers initially retrieved. They included five studies using a single sample pre and post-test design, and two using a randomised controlled trial design. The programs under study varied and included mindfulness-based: yoga, childbirth education, cognitive therapy and practices. Outcomes between studies also varied but stress, anxiety, depression and mindfulness were measured predominantly. A meta-analysis was not performed because of the differences in participant characteristics, interventions and outcomes measured. Non-significant trends towards a decrease in stress, anxiety and depression and an increase in mindfulness were noted. However, all studies examined had small sample sizes. Conclusion: The evidence for the effectiveness of mindfulness based programs to support perinatal mental health remains inconclusive. Further adequately powered, well designed clinical trials are merited.