title: Pregnancy outcome according to pre-pregnancy body mass index and gestational weight gain.
abstract: OBJECTIVE
  To assess birth weight in relation to gestational weight gain (GWG) among women who were and were not obese before pregnancy.
  
  
  METHODS
  For a retrospective cohort study, data were obtained for women with a pre-pregnancy body mass index (BMI, calculated as weight in kilograms divided by the square of height in meters) of at least 30 who had a singleton delivery at a center in Denmark in 2010-2011. Data were also obtained for 455 non-obese women (BMI 20.0-24.9). GWG was expressed in absolute terms and relative to published recommendations (11-16kg in non-obese women; 5-9kg in obese women).
  
  
  RESULTS
  A total of 231 obese women were included in analyses. In non-obese and obese women, fetal weight was highest when GWG was above the recommended amount. Among women who had a GWG in line with the recommendations, mean birth weight was higher among those with a pre-pregnancy BMI of 35.0-39.9 (3758±410g) or at least 40 (3671±374g) than among non-obese women (3394±453g; P=0.0058).
  
  
  CONCLUSIONS
  Birth weight is related to both maternal BMI and GWG. In obese women, adherence to GWG recommendations does not seem to prevent increased birth weights.
authors: Department of Obstetrics and Gynecology, Hvidovre Hospital, University of Copenhagen, Hvidovre, Denmark. Electronic address: wgb689@alumni.ku.dk.
authors: Joanna
authors: J
authors: Gesche
authors: Department of Obstetrics and Gynecology, Hvidovre Hospital, University of Copenhagen, Hvidovre, Denmark.
authors: Lisbeth
authors: L
authors: Nilas
mesh_terms: D000328:Adult; D001724:Birth Weight; D015992:Body Mass Index; D036861:Delivery, Obstetric / Q000706:statistics & numerical data*; D003718:Denmark / Q000453:epidemiology; D005260:Female; D005320:Fetal Macrosomia / Q000453:epidemiology; D020567:Fetal Weight; D017408:Guidelines as Topic; D006801:Humans; D015931:Intensive Care, Neonatal / Q000706:statistics & numerical data; D009765:Obesity / Q000453:epidemiology*; D010349:Patient Compliance; D011225:Pre-Eclampsia / Q000453:epidemiology; D011247:Pregnancy; D011256:Pregnancy Outcome / Q000453:epidemiology*; D012189:Retrospective Studies; D015430:Weight Gain
keywords: Body mass index; Fetal weight; Gestational weight gain; Obesity; Pregnancy