title: [Is natural progesterone the drug choice in the primary prevention of premature labor?].
authors.forename: E B
authors.initials: EB
authors.lastname: Fonseca
mesh_terms: D005260:Female; D006801:Humans; D007752:Obstetric Labor, Premature / Q000517:prevention & control*; D011247:Pregnancy; D011374:Progesterone / Q000008:administration & dosage / Q000627:therapeutic use*
chemical_list: D011374:Progesterone