Research Summary

 Provide a summary (brief background of the topic, summary of the research findings, and conclusion based on findings from included studies) for healthcare professional 

Please use these 4 articles to write a summary:

ARTICLE 1 : https://onlinelibrary.wiley.com/doi/full/10.1002/oby.21210

  ARTICLE 2:  https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5892813/

ARTICLE 3:  https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5892813/ 

ARTICLE  4: https://bmcpregnancychildbirth.biomedcentral.com/track/pdf/10.1186/s12884-017-1538-7.pdf