title: [Analysis of obstetric outcomes for different types of placenta previa].
abstract: OBJECTIVE
  To explore the maternal and perinatal outcomes for different types of placenta previa (PP).
  
  
  METHODS
  A total of 343 pregnancies with PP from January 2003 to December 2012 at our hospital were retrospectively reviewed. The general profiles, maternal and perinatal outcomes of different types of 325 singleton PP were evaluated.
  
  
  RESULTS
  Among them, 221 pregnancies were of complete PP. There were partial (n = 22) and marginal (n = 82) PP. Proportions of previous vaginal and cesarean deliveries in women with complete and partial PP were higher than those with marginal PP (P < 0.05). Compared with marginal PP group, ratio of placenta in the uterus posterior wall prepartum hemorrhage and probability of blood transfusion and neonatal asphyxia were much higher in complete and partial PP. The gestational age at delivery and neonatal body weight with complete PP and partial PP marginal PP were higher than those of the other two groups (P < 0.05). As for the placenta adhesion, placenta accrete or postpartum hemorrhage, no difference existed among three groups placenta location.
  
  
  CONCLUSIONS
  The gestational age at delivery, prepartum hemorrhage, probability of blood transfusion and perinatal outcome in women with PP are related with the type of PP. Both complete and partial PP have relatively worse outcomes. The type of PP has no effect on placenta adhesion, placenta accrete or postpartum hemorrhage.
authors.affiliation: Department of Obstetrics & Gynecology, Peking University First Hospital, Beijing 100034, China.
authors.forename: Xiu-li
authors.initials: XL
authors.lastname: Yang
authors.forename: Ying-fang
authors.initials: YF
authors.lastname: Zhou
authors.forename: Yan
authors.initials: Y
authors.lastname: Huang
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang
authors.forename: Hui-xia
authors.initials: HX
authors.lastname: Yang
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D010923:Placenta Previa / Q000145:classification* / Q000175:diagnosis*; D011247:Pregnancy; D011256:Pregnancy Outcome; D012189:Retrospective Studies; D012307:Risk Factors