title: Etiology of premature labor.
mesh_terms: D000818:Animals; D002584:Cervix Uteri / Q000502:physiology; D005260:Female; D005322:Premature Rupture of Fetal Membranes / Q000503:physiopathology; D006801:Humans; D007752:Obstetric Labor, Premature / Q000209:etiology* / Q000503:physiopathology; D011247:Pregnancy; D011453:Prostaglandins / Q000502:physiology; D012756:Sheep; D014590:Uterine Contraction
chemical_list: D011453:Prostaglandins