Natural Hospital Birth Introduction

References:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1595133/
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3392605/#!po=31.2500
http://www.aphp.ca/pdf/CHMPPS%20report.pdf
http://www.ncbi.nlm.nih.gov/pubmed/17097202
http://sogc.org/wp-content/uploads/2012/09/BirthingStrategyVersioncJan2008.pdf
http://www.womenandhealthcarereform.ca/publications/maternity_en.pdf