title: [Causes of premature labor. Observations on the course of hospitalization of premature infants].
mesh_terms: D001724:Birth Weight; D005260:Female; D006760:Hospitalization; D006801:Humans; D007231:Infant, Newborn; D007235:Infant, Premature, Diseases / Q000401:mortality; D008297:Male; D008423:Maternal Age; D007752:Obstetric Labor, Premature / Q000209:etiology*; D011247:Pregnancy; D012959:Socioeconomic Factors
vernacular_title: Przyczyny wywołujace porody przedwczesne a przebieg okresu hospitalizacji wcześniaków.