IRCT20091023002624N27 IRCT 2018-08-24 Iran University of Medical Sciences Effects of isosorbide mononitrate on cervical ripening Evaluation of the efficacy of isosorbide mononitrate on cervical ripening in outpatient pregnant women with unfavorable cervix. 2016-04-20 anticipated 142 Complete https://irct.ir/trial/32838 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: Eligible women were randomly assigned into two groups of drug and placebo. Randomization was performed using sealed envelopes and participants were divided in four blocks; A, B, C, D. Groups A and C received drug and groups B and D received placebo, Blinding description: Researcher, patients and outcome assessors, were not aware of the groups to which participants were allocated. The placebo was completely similar to isosorbide mononitrate in shape, taste and smell, and was made by the same manufacturer. 3 Condition 1: Cervical ripening in pregnancy. Condition 2: Prolonged pregnancy. Condition 3: Failed medical induction of labour. Intervention 1: Intervention group: Two capsules of 50 mg isosorbide-5-mononitrate were inserted in the posterior vaginal fornix in two consecutive days (50 mg per day). Intervention 2: Control group: Two capsules of placebo, were inserted in the posterior vaginal fornix by the researcher in two consecutive days (50 mg per day). Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is There is no further information