1. Induction of Labor
2. Obstetric Variation, Intervention, and Outcomes: Doing More but Accomplishing Less
3. MartinJA HamiltonBE OstermanJK CurtinSC MathewsTJ.Births: Final data for 2012. National vital statistics reports; vol 62 no 9. Hyattsville MD: National Center for Health Statistics.www.cdc.gov/nchs/data/nvsr/nvsr62/nvsr62_09.pdf. Accessed October 2014.
4. Osterman JK Martin JA.National Center for Health Statistics: Recent declines in induction of labor by gestational age. Centers for Disease Control and Prevention Web site.http://www.cdc.gov/nchs/data/databriefs/db155.pdf. Accessed June 30 2014 .
5. ACOG Practice Bulletin No. 107: Induction of Labor