IRCT20160524028038N19 IRCT 2024-02-27 Yasouj University of Medical Sciences Sildenafil and fetal heart rate The effect of sildenafil on fetal heart rate patterns during labor in primiparous pregnant women 2024-04-04 anticipated 100 Complete https://irct.ir/trial/75672 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: The randomization method is simple. The random allocation sequence will be determined using the "computer Random generation" computer program. The sealed envelopes encoded and non-transparent ( A,B) for the allocation of subjects to intervention ( A) and control (B) groups will be used, Blinding description: The blinding method is patients will not be aware of their allocation to study groups. N/A Fetal heart rate during labor. Intervention 1: Intervention group: In addition to induction and routine interventions during labor, they will receive oral sildenafil at a dose of 50 mg every 8 hours up to a maximum of 150 mg, the first dose of which is prescribed at the beginning of the study. Intervention 2: Control group: Induction and routine interventions are performed. No - There is not a plan to make this available Justification or reason for not sharing IPD is No more information