title: Prepregnancy body mass index as an important predictor of perinatal outcomes in Japanese.
abstract: OBJECTIVE
  The influence of maternal body mass index (BMI) before pregnancy and weight gain during pregnancy on perinatal outcomes in the Japanese population remains to be elucidated. Therefore, we estimated the risk of perinatal morbidity of the mother and infant with respect to maternal prepregnancy BMI and weight gain during pregnancy in Japanese.
  
  
  RESULTS
  In the obese before pregnancy group, the risks of cesarean delivery, preeclampsia, and gestational diabetes were significantly elevated compared with the normal group. In the underweight before pregnancy group, the risks of low birth weight infant and hospitalization of infant were elevated significantly.
  
  
  CONCLUSIONS
  However, weight gain during pregnancy did not show any significant influence on the perinatal outcomes of the mother or infant.
authors.affiliation: Department of Obstetrics and Gynecology, Yamagata University School of Medicine, 2-2-2 Iida-nishi, Yamagata-city, Yamagata 9909585, Japan. makim@med.id.yamagata-u.ac.jp
authors.forename: Maki
authors.initials: M
authors.lastname: Murakami
authors.forename: Masahide
authors.initials: M
authors.lastname: Ohmichi
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Takahashi
authors.forename: Akiko
authors.initials: A
authors.lastname: Shibata
authors.forename: Akira
authors.initials: A
authors.lastname: Fukao
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Morisaki
authors.forename: Hirohisa
authors.initials: H
authors.lastname: Kurachi
mesh_terms: D000293:Adolescent; D000328:Adult; D015992:Body Mass Index; D002585:Cesarean Section / Q000706:statistics & numerical data; D016640:Diabetes, Gestational / Q000453:epidemiology; D005260:Female; D005865:Gestational Age; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D007564:Japan / Q000453:epidemiology; D009765:Obesity / Q000150:complications* / Q000453:epidemiology; D011225:Pre-Eclampsia / Q000453:epidemiology / Q000209:etiology; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology*; D011256:Pregnancy Outcome / Q000453:epidemiology*; D047928:Premature Birth / Q000453:epidemiology; D012189:Retrospective Studies; D012307:Risk Factors; D013851:Thinness / Q000150:complications* / Q000453:epidemiology; D015430:Weight Gain / Q000502:physiology