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2. National Institute for Health and Care Excellence (NICE) Induction of labour. Secondary Induction of labour 2001 http://publications.nice.org.uk/induction-of-labour-cg70
3. Danish Society for Obstetricians and Gynaecologists (DSOG) Guideline on prolonged pregnancy 2009 http://gynobsguideline.dk/files/Graviditas%20prolongata2011_endelig.pdf
4. Caughey AB Sundaram V Kaimal AJ Cheng YW Gienger A Little SE Maternal and neonatal outcomes of elective induction of labor: Evidence report number 176 2009 http://www.ahrq.gov/research/findings/evidence-based-reports/eil-evidence-report.pdf
5. Reduction in stillbirths at term after new birth induction paradigm. Results of a national intervention;Hedegaard;BMJ open,2014