title: The effect of IVF pregnancies on mortality and morbidity in tertiary unit.
abstract: BACKGROUND
  There are several studies that have shown an increased risk of premature birth and developmental abnormalities with in vitro fertilization (IVF); however, the data on preterm mortality and morbidity are limited.
  
  
  OBJECTIVE
  Our aim is to investigate whether IVF had an effect on the mortality and morbidity in neonates admitted to the neonatal intensive care unit.
  
  
  METHODS
  A total of 940 term and preterm babies who were admitted to the intensive care unit over a period of 2 years were enrolled. Of these, 121 babies were born after IVF and 810 were born after a natural conception and 9 were born after ovulation induction. Of these, 112 preterm babies were born after IVF and 405 preterm babies were born after a natural conception.
  
  
  RESULTS
  In the IVF group, the gestational age and birth weight were significantly lower than in the non-IVF group. Additionally, in the IVF group, multiple births were significantly higher than in the non-IVF group. IVF pregnancies increase preterm delivery but did not increase preterm mortality, and preterm morbidity did not differ among groups, except for intraventricular hemorrhage (IVH). Gestational age was shown to be the primary risk factor for IVH using a logistic regression analysis. Also when newborns at gestational age <32 weeks were compared using regression analysis, gestational age was the major risk factor for IVH.
  
  
  CONCLUSIONS
  IVF appears to be associated with premature delivery and the known risks associated with prematurity.
authors.affiliation: Department of Pediatrics, Neonatology Division, Faculty of Medicine, Kocaeli University, Umuttepe Campus, Kocaeli 41380, Turkey. gulcanturker@kocaeli.edu.tr
authors.forename: Gülcan
authors.initials: G
authors.lastname: Turker
authors.forename: Emek
authors.initials: E
authors.lastname: Doger
authors.forename: Ayşe Engin
authors.initials: AE
authors.lastname: Arısoy
authors.forename: Ayla
authors.initials: A
authors.lastname: Günlemez
authors.forename: Ayşe Sevim
authors.initials: AS
authors.lastname: Gökalp
mesh_terms: D001724:Birth Weight; D005260:Female; D005307:Fertilization in Vitro / Q000706:statistics & numerical data*; D006785:Hospitals, University; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn; D007234:Infant, Premature; D019102:Infant, Very Low Birth Weight; D007363:Intensive Care Units, Neonatal; D007752:Obstetric Labor, Premature; D011247:Pregnancy; D012307:Risk Factors; D014421:Turkey / Q000453:epidemiology