IRCT20120918010876N3 IRCT 2017-12-16 Shahid Beheshti University of Medical Sciences- Mahdieh Hospital Assessment of efficacy of antenatal betamethasone on neonatal respiratory outcome of late preterm delivery (34-37 weeks) Assessment of efficacy of antenatal betamethasone on neonatal respiratory outcome of late preterm delivery (34-37 weeks) in singleton pregnancies 2017-03-21 anticipated 200 Complete https://irct.ir/trial/11296 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Prevention, Randomization description: Simple randomization with random number table. 2 Respiratory distress syndrome of newborn. Intervention 1: Treatment group: intramuscular injection of 12 mg betamethasone in two doses between 24 hours. Intervention 2: Control group: No Treatment. No - There is not a plan to make this available Justification or reason for not sharing IPD is No need for publishing data file