title: Outcomes of infants born to mothers with inflammatory bowel disease: a population-based cohort study.
abstract: OBJECTIVE
  Limited population-based data on inflammatory bowel disease (IBD) and pregnancy outcomes exist. The purpose of this study is to determine the association between maternal IBD status and adverse pregnancy outcomes.
  
  
  METHODS
  Using computerized birth records of infants born to mothers with Crohn's disease (CD) or ulcerative colitis (UC) and mothers without diagnoses of IBD (no-IBD) in Washington State, we performed a cross-sectional retrospective study to determine gestational age, birth weight, and congenital malformations.
  
  
  RESULTS
  Preterm delivery was seen in 15.2% of CD births, 10.4% of UC births, and 7.2% of no-IBD births. Low birth weight was found in 16.8% of CD births, 7.6% of UC births, and 5.3% of no-IBD births. Smallness for gestational age was present in 15.2% of CD births, 10.5% of UC births, and 6.9% of no-IBD births. Only CD births were at significantly increased risk of preterm delivery (p < 0.0025), low birth weight (p < 0.001), and smallness for gestational age (p < 0.001). Congenital malformations were more commonly recorded in UC births than in controls (7.9% vs 1.7%, p < 0.001), whereas 3.4% of CD births had malformations recorded. Using multivariable logistic regression, CD births were more likely to be preterm (odds ratio [OR] = 2.3, 95% CI = 1.4-3.8) and have low birth weights (OR = 3.6, CI = 2.2-5.9) and smallness for gestational age (OR = 2.3, CI = 1.3-3.9). UC births were more likely to have congenital malformations reported (OR = 3.8, CI = 1.5-9.8).
  
  
  CONCLUSIONS
  Maternal IBD is associated with increased odds of preterm delivery, low birth weight, smallness for gestational age (CD), and reporting of congenital malformations (UC).
authors.affiliation: Department of Medicine, University of Washington School of Medicine, Health Services Research and Development, and VA Puget Sound Health Care System, Seattle, USA.
authors.forename: Jason A
authors.initials: JA
authors.lastname: Dominitz
authors.forename: Josephine C C
authors.initials: JC
authors.lastname: Young
authors.forename: Edward J
authors.initials: EJ
authors.lastname: Boyko
mesh_terms: D000328:Adult; D015331:Cohort Studies; D003093:Colitis, Ulcerative / Q000150:complications*; D000013:Congenital Abnormalities / Q000209:etiology*; D003424:Crohn Disease / Q000150:complications*; D003430:Cross-Sectional Studies; D005260:Female; D005865:Gestational Age; D006304:Health Status; D006801:Humans; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D007752:Obstetric Labor, Premature / Q000209:etiology*; D011247:Pregnancy; D011248:Pregnancy Complications; D011256:Pregnancy Outcome; D012189:Retrospective Studies