[Perinatal mortality of newborn infants in Poland].
D005260:Female; D005313:Fetal Death / Q000453:epidemiology*; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn; D011044:Poland; D011247:Pregnancy
Umieralność okołoporodowa noworodków w Polsce.