IRCT20181107041585N3 IRCT 2020-04-07 Bandare-abbas University of Medical Sciences Effect of vaginal evening primrose capsules on ripening of the cervix Effect of vaginal evening primrose capsules on ripening of the cervix of nulliparous pregnant women 2018-09-23 anticipated 200 Complete https://irct.ir/trial/46166 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: Randomization method: Simple Random unit: Individual Randomization Tool: Sealed Envelope, Blinding description: In order to blind the allocation, the pills will be divided into the opaque A and B packets and numbered. Participant, clinical caregiver, researcher, and outcome evaluator will be unaware of the type of intervention. 3 Post term pregnancy. Intervention 1: Intervention group: Administration of single dose of 1000 mg evening primrose oil capsule made by Natural-weber Canada company vaginally immediately after admission and after primery evaluation. Intervention 2: Control group: Administration of single dose of placebo vaginally immediately after admission and after primary evaluation. No - There is not a plan to make this available Justification or reason for not sharing IPD is Confidentiality