title: Perinatal outcome after selective feticide in monochorionic twin pregnancies.
abstract: OBJECTIVE
  To evaluate the incidence and risk factors of adverse perinatal outcome in complicated monochorionic twin pregnancies treated with selective feticide.
  
  
  METHODS
  This was a retrospective analysis of prospectively collected data from a consecutive, national cohort. All monochorionic twin pregnancies treated with selective feticide at Leiden University Medical Center between June 2000 and November 2011 were included. Obstetric and neonatal data were recorded. The primary outcome measure was adverse perinatal outcome, including fetal or neonatal demise or severe neonatal morbidity.
  
  
  RESULTS
  Data on perinatal outcome were obtained in all cases (n = 131). Overall perinatal survival rate was 67.2% (88/131). Median gestational age at delivery was 34 (interquartile range, 23-38) weeks. Neonatal mortality and morbidity rate in liveborn children was 4.3% (4/92) and 12.0 % (11/92), respectively. Severe cerebral injury was detected in three children. The overall incidence of adverse perinatal outcome was 41.2% (54/131). Median gestational age at occurrence of preterm prelabor rupture of membranes (PPROM) was 19.0 weeks and 32.0 weeks in cases with and without adverse perinatal outcome, respectively (P = 0.017). Liveborn children with adverse perinatal outcome were born at a lower median gestational age (29.0 weeks) than were children without adverse perinatal outcome (38.0 weeks) (P < 0.001).
  
  
  CONCLUSIONS
  The risk of adverse perinatal outcome after selective feticide is high and associated with low gestational age at occurrence of PPROM and low gestational age at delivery. Long-term follow-up to assess neurodevelopmental outcome in survivors is required.
authors: Division of Neonatology, Leiden University Medical Center, Leiden, The Netherlands.
authors: E M
authors: EM
authors: van den Bos
authors: J M M
authors: JM
authors: van Klink
authors: J M
authors: JM
authors: Middeldorp
authors: F J
authors: FJ
authors: Klumper
authors: D
authors: D
authors: Oepkes
authors: E
authors: E
authors: Lopriore
mesh_terms: D017115:Catheter Ablation / Q000009:adverse effects / Q000401:mortality; D005260:Female; D005322:Premature Rupture of Fetal Membranes / Q000209:etiology / Q000401:mortality; D005332:Fetoscopy / Q000009:adverse effects / Q000401:mortality; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D017075:Laser Coagulation / Q000009:adverse effects / Q000401:mortality; D011247:Pregnancy; D011256:Pregnancy Outcome; D018607:Pregnancy Reduction, Multifetal / Q000009:adverse effects* / Q000379:methods / Q000401:mortality; D059285:Pregnancy, Twin; D011446:Prospective Studies; D012189:Retrospective Studies; D012307:Risk Factors; D014430:Twins, Monozygotic