[PERINATAL MORTALITY IN PREMATURE LABOR].
D001724:Birth Weight; D003604:Czechoslovakia; D005260:Female; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D007234:Infant, Premature; D007743:Labor, Obstetric; D007752:Obstetric Labor, Premature; D066087:Perinatal Death; D054238:Perinatal Mortality; D011247:Pregnancy
BIRTH WEIGHT; CZECHOSLOVAKIA; INFANT MORTALITY; INFANT, NEWBORN; INFANT, PREMATURE; LABOR, PREMATURE; PREGNANCY
PERINAT'ALNA 'UMRTNOST' U PRED CASN'YCH P ORODOV.