Nitric Oxide Donor Isosorbide Mono Nitrate for Cervical Ripening in Induction of Labor

40 mg tablet of intra-vaginal IMN (Effox; MINAPHARMA, Cairo, Egypt) will be placed into the posterior fornix of the vagina, through a digital vaginal examination, every 4 h for a maximum of four doses.

In placebo group (group 2) 40 mg intra-vaginal pyridoxine placebos every 4 h for a maximum of four doses will be given