title: Progestational agents to prevent preterm birth: a meta-analysis of randomized controlled trials.
authors.forename: Shakila
authors.initials: S
authors.lastname: Thangaratinam
authors.forename: Aravinthan
authors.initials: A
authors.lastname: Coomarasamy
mesh_terms: D005260:Female; D006801:Humans; D011247:Pregnancy; D047928:Premature Birth / Q000517:prevention & control*; D011372:Progestins / Q000627:therapeutic use*; D016032:Randomized Controlled Trials as Topic
chemical_list: D011372:Progestins