title: [Correlations between breech delivery and perinatal mortality].
mesh_terms: D002031:Bulgaria; D005260:Female; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D007234:Infant, Premature; D007746:Labor Presentation; D011247:Pregnancy
vernacular_title: Vurkhu niakoi korelatsii mezhdu sedalishtnoto razhdanie i stoĭnostite na perinatalnata smurtnost.