title: [Is there an increasing frequency of long-term perinatal morbidity with decreasing perinatal mortality or is it also declining].
abstract: OBJECTIVE
  To evaluate the changes of late perinatal morbidity related to the decrease perinatal mortality.
  
  
  METHODS
  Comparative epidemiological study.
  
  
  METHODS
  Institute for the Care of Mother and Child, Prague.
  
  
  METHODS
  Comparison of epidemiological national and international data on the relationship of perinatal mortality and late perinatal morbidity.
  
  
  RESULTS
  When the value of perinatal mortality was higher than 10 per thousand (in developed countries in 90's of the previous century), the incidence of late perinatal morbidity, mostly characterised by the incidence of cerebral palsy and serious mental retardation evaluated in different periods after delivery decreased with the decrease of perinatal mortality. However, with the decrease of specific early neonatal mortality the late perinatal morbidity started to increase. This increase depends on the birthweight and on the selected criteria evaluating the relationship of perinatal mortality and long-term perinatal morbidity in different studies. On the other hand, the absolute number of newborns increases with the decrease of perinatal mortality and the number of infants with late perinatal morbidity decreases.
  
  
  CONCLUSIONS
  When perinatal mortality is low, the decrease of specific early neonatal mortality leads to the increase of late perinatal morbidity. The extent depends on the birthweight and on the selected criteria. Absolute number of infants with late perinatal morbidity decreases.
authors.affiliation: Ustav pro péci o matku a dítĕ, Praha.
authors.forename: Z
authors.initials: Z
authors.lastname: Stembera
mesh_terms: D002547:Cerebral Palsy / Q000453:epidemiology*; D018153:Czech Republic / Q000453:epidemiology; D006801:Humans; D015994:Incidence; D007226:Infant Mortality / Q000639:trends*; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000453:epidemiology*; D008607:Intellectual Disability / Q000453:epidemiology