title: Twin chorionicity and prospective stillbirth risk: experience at a tertiary care hospital.
abstract: OBJECTIVE
  To determine the prospective risk of stillbirth, perinatal death and neonatal morbidities in twins.
  
  
  METHODS
  This retrospective cohort study was conducted at the Aga Khan University Hospital, Karachi, and comprised cases of twin pregnancies from January 2001 to December 2012. . Cases of both monochorionic diamniotic and dichorionic diamniotic twin pregnancies were included. SPSS 19 was used for data analysis..
  
  
  RESULTS
  Of the 394 cases, 84(21.3%) were monochorionic diamniotic twins and 310(78.7%) were dichorionic diamniotic twins. There were no cases of stillbirth beyond 30 and 34 weeks in monochorionic and dichorionic twins, respectively. Neonatal mortality stood reduced beyond 36 weeks of gestation in both groups. Neonatal morbidity reduced beyond 35 weeks of gestation in both groups..
  
  
  CONCLUSIONS
  Perinatal mortality and morbidity in twin gestation decreased as the gestation advanced.
authors.affiliation: Department of Obstetrics and Gynecology, The Aga Khan University Hospital, Karachi Pakistan.
authors.forename: Shazia
authors.initials: S
authors.lastname: Masheer
authors.affiliation: Department of Obstetrics and Gynecology, The Aga Khan University Hospital, Karachi Pakistan.
authors.forename: Zaheena
authors.initials: Z
authors.lastname: Islam
authors.affiliation: Department of Obstetrics and Gynecology, The Aga Khan University Hospital, Karachi Pakistan.
authors.forename: Dhanwanti
authors.initials: D
authors.lastname: Dileep
authors.affiliation: Department of Obstetrics and Gynecology, The Aga Khan University Hospital, Karachi Pakistan.
authors.forename: Shama
authors.initials: S
authors.lastname: Munim
mesh_terms: D000328:Adult; D002823:Chorion / Q000502:physiology*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D010154:Pakistan / Q000453:epidemiology; D011247:Pregnancy; D059285:Pregnancy, Twin / Q000706:statistics & numerical data*; D012189:Retrospective Studies; D050497:Stillbirth / Q000453:epidemiology*; D062606:Tertiary Care Centers; D014427:Twins / Q000706:statistics & numerical data*; D055815:Young Adult
keywords:  Twin pregnancy, Stillbirth, Prospective risk, Chorionicity, Perinatal morbidity, Mortality.