title: [Causes of stillbirths according to the period of pregnancy].
abstract: BACKGROUND
  Stillbirths represent 50% of all perinatal mortality and remain significant and unanswered problem.
  
  
  OBJECTIVE
  To investigate the causes of stillbirths in term and preterm fetuses and place of intrauterine growth retardation in the pathogenesis of antenatal death.
  
  
  METHODS
  The study was retrospective for the period 2008 to 2013, covers 217 cases of stillbirths in University Hospital "Maichin dom" Sofia. Gestational age was from 23 to 41 weeks. Inclusion criteria for the study were: antenatal occurred dead and singleton pregnancy. Exclusion criteria: fetal malformations and multiple pregnancies. Thus number of enrolled cases was 153.
  
  
  RESULTS
  The causes of stillbirths are different in different groups according gestational age. The cases of unknown cause, abruption of placenta and preeclampsia prevail in preterm group. The term stillborns headed with pathology of the umbilical cord, followed by cases of unknown cause, diabetes and infection. Overall, preterm group stillborn with mass below 10 percentile for the gestational age - 53 % predominate, compared with those born at term - 39%.
  
  
  CONCLUSIONS
  The incidence of stillbirths is higher in preterm than term born fetuses. The causes of antenatal death in preterm is mainly abruption of placenta and preeclampsia, whereas in term - pathology of the umbilical cord. In premature stillborn intrauterine growth retardation is more common in comparison with those on term. Unexplained antenatal fetal death is more common in preterm fetuses.
authors.forename: G
authors.initials: G
authors.lastname: Dimitrov
authors.forename: B
authors.initials: B
authors.lastname: Frandeva
authors.forename: T
authors.initials: T
authors.lastname: Garnizov
authors.forename: V
authors.initials: V
authors.lastname: Zlatkov
authors.forename: A
authors.initials: A
authors.lastname: Dimitrov
mesh_terms: D002031:Bulgaria / Q000453:epidemiology; D005260:Female; D005317:Fetal Growth Retardation / Q000453:epidemiology; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D010920:Placenta / Q000473:pathology; D011225:Pre-Eclampsia / Q000453:epidemiology; D011247:Pregnancy; D012189:Retrospective Studies; D050497:Stillbirth / Q000453:epidemiology*; D014470:Umbilical Cord / Q000473:pathology