1. Factors promoting or inhibiting normal birth;Prosser SJ;BMC Pregnancy Childbirth,2018
2. -Wing DA, Sheibani L. 2015. Pharmacotherapy options for induction of labor. Expert opinion on pharmacotherapy, 16(11), pp.1657–1668. Available from https://www.tandfonline.com/doi/abs/10.1517/14656566.2015.1060960
3. -Sciscione AC. 2014. Methods of cervical ripening and induction of labor: mechanical. Clinical obstetrics and gynecology, 57(2), pp.369–376. Available from https://journals.lww.com/clinicalobgyn/Citation/2014/06000/Methods_of_Cervical_Ripening_and_Labor_Induction__.15.aspx
4. Banos N, Migliorelli F, Posadas E, Ferreri J, Palacio M. 2015. Definition of failed induction of labor and its predictive factors: two unsolved issues of an everyday clinical situation. Neonate diagnosis and therapy, 38(3), pp.161–169.avilable from https://www.karger.com/Article/Abstract/433429
5. Rampersad R, Macones GA. 2018. Prolonged and postterm pregnancy. Gabbe's Obstetrics Essentials: Normal & Problem Pregnancies E-Book, p.270. Available from https://books.google.iq/books?hl=en&lr=&id=opxYDwAAQBAJ&oi=fnd&pg=PA270&dq=Rampersad,+R.+and+Macones,+G.A.,+2018.+Prolonged+and+postterm+pregnancy.+Gabbe%27s+Obstetrics+%E2%80%8EEssentials:+Normal+%26+Problem+Pregnancies+EBook,+p.270.%E2%80%8E&ots=NrmCdb8H1E&sig=KRwIhxEfdairC0xQX1LAIGUv4Lk&redir_esc=y#v=onepage&q&f=false