title: Gestational weight gain and postpartum behaviors associated with weight change from early pregnancy to 1 y postpartum.
abstract: OBJECTIVE
  (1) To describe the relative importance of gestational weight gain, postpartum exercise, food intake and breastfeeding to weight change from early pregnancy to 1 y postpartum; and (2) to identify subgroups of women at greatest risk for major weight gain surrounding childbearing.
  
  
  METHODS
  A prospective cohort study of women who registered for obstetrical care in a hospital and primary care clinic system serving a 10 county area of upstate New York.
  
  
  METHODS
  A total of 540 healthy adult women who gave birth to full-term singleton infants.
  
  
  METHODS
  Sociodemographic characteristics, exercise, food-related behaviors and breastfeeding were assessed using the medical record and a mailed questionnaire. Body weight was measured at prenatal visits and 1 y postpartum. Weight retained and major weight gain (4.55 kg) at 1 y postpartum were the main outcomes.
  
  
  METHODS
  Linear and logistic regression analyses were conducted.
  
  
  RESULTS
  Women were on average 1.51+/-5.95 kg heavier at 1 y postpartum than they were in early pregnancy. Nearly 25% of women experienced a major weight gain of 4.55 kg or more at 1 y postpartum. Gestational weight gain, exercise frequency, change in food intake and breastfeeding were each significantly related to postpartum weight retention. With the exception of breastfeeding, all of these factors were also associated with major weight gain. Women under 20 y or over 40 y at delivery, and single women retained significantly more weight. Lower income women with gestational weight gains above the Institute of Medicine (IOM) range retained 3.73 kg more than lower income women who gained within the range. They were also 4.7 times more likely to experience major weight gain with childbearing. The impact of exceeding the IOM gestational weight gain guidelines was three times greater in lower income women than it was in higher income women.
  
  
  CONCLUSIONS
  Gestational weight gain, postpartum exercise frequency, and food intake are significantly associated with weight change from early pregnancy to 1 y postpartum and major weight gain with childbearing. Lower income women who gain more weight in pregnancy than the IOM recommends are at high risk for major weight gain with childbearing.
authors.affiliation: Division of Nutritional Sciences, Cornell University, Ithaca, New York 14853, USA.
authors.forename: C M
authors.initials: CM
authors.lastname: Olson
authors.forename: M S
authors.initials: MS
authors.lastname: Strawderman
authors.forename: P S
authors.initials: PS
authors.lastname: Hinton
authors.forename: T A
authors.initials: TA
authors.lastname: Pearson
mesh_terms: D000328:Adult; D015992:Body Mass Index; D015331:Cohort Studies; D004435:Eating; D002149:Energy Intake; D015444:Exercise / Q000502:physiology; D005260:Female; D006801:Humans; D016015:Logistic Models; D011181:Postnatal Care; D049590:Postpartum Period / Q000502:physiology; D011247:Pregnancy / Q000502:physiology*; D011446:Prospective Studies; D012044:Regression Analysis; D012307:Risk Factors; D015430:Weight Gain / Q000502:physiology*