[Perinatal infant mortality in premature deliveries].
D002031:Bulgaria; D005260:Female; D005313:Fetal Death; D006306:Health Surveys; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D007234:Infant, Premature; D008297:Male; D007752:Obstetric Labor, Premature; D011247:Pregnancy; D011248:Pregnancy Complications
Perinatalna detska smurtnost pri prezhdevremennite razhdaniia.