IRCT20190309042978N2 IRCT 2019-03-19 Mazandaran University of Medical Sciences Effect of 17 α-Hydroxyprogesterone caproate on prevention of preterm labor. A clinical trial to comparison the effectiveness of 17 α-Hydroxyprogesterone caproate with routine prenatal care on prevention of preterm labor in patients with a history of preterm labor. 2019-03-21 anticipated 100 Complete https://irct.ir/trial/38168 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Prevention, Randomization description: Totally 100 pregnant women with history of preterm labor at the Imam Khomeini Hospital, Sari, Iran, were chosen. The participants were allocated into groups of intervention and control using the table of random numbers based on computer programs, Blinding description: Pregnant women with history of preterm labor at the Imam Khomeini Hospital, Sari, Iran, were chosen. In this double-blind study, the clinical care and data collector were blind to group assignment and the type of treatment. 3 Preterm labor. Intervention 1: Intervention group: The intervention group will receive 250 mg intra-muscular 17 α-Hydroxyprogesterone caproate at 16 weeks of gestation up to 37 weeks of gestation every week. Intervention 2: Control group: The control group will receive routine prenatal care without any special interventions. Yes - There is a plan to make this available What will be shared: Information on the main outcome or the like can be shared. When: 6 months after printing results To whom: Our data will only be available to researchers working at science centers and universities Conditions: Our data will be available for scholars working at science centers and universities Where to obtain: Hamed Jafarpour provides the data analysis to the applicants via email: h.jafarpour@mazums.ac.ir How to obtain: Applicants can respond to the email of the respondent and receive a response within a week. Comments: