1. ACOG Practice Bulletin No. 107. American College of Obstetricians and Gynecologists;Induction of labor. Obstet Gynecol,2009
2. SOGC Clinical Practice Guideline No 296. Induction of Labour, 2013;Society of Obstetricians and Gynaecologists of Canada;J Obstet Gynaecol Can,2013
3. Labour induction with prostaglandins: a systematic review and network meta-analysis;Z Alfirevic;BMJ,2015
4. Labour induction versus expectant management in low-risk nulliparous women;WA Grobman;N Engl J Med,2018
5. Vaginal prostaglandin (PGE2 and PGF2α) for induction of labour at term;A Kelly;Cochrane Database Syst Rev,2009