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 : h
ARTICLE 2:
ARTICLE 3:
ARTICLE 4: https://bmcpregnancychildbirth.biomedcentral.com/track/pdf/10.1186/s12884-017-1538-7.pdf
