title: Understanding gestational weight gain: the role of weight-related expectations and knowledge.
abstract: BACKGROUND
  Health behaviour theories acknowledge that beliefs, attitudes and knowledge contribute to health behaviours, yet the role of these cognitions in predicting weight gain during pregnancy has not been widely researched.
  
  
  OBJECTIVE
  To explore and compare the predictive nature of gestational weight gain (GWG) expectations and knowledge on weight gain during pregnancy.
  
  
  METHODS
  One hundred and sixty-six women were tracked during pregnancy. Participants provided information on prepregnancy weight, height, GWG expectations and knowledge at 16-18 weeks' gestation (Time 1). To calculate gestational weight gain, prepregnancy weight was subtracted from weight at 36 weeks' gestation (collected at Time 2). Gestational weight gain above the Institute of Medicine's GWG recommendations was classified as excessive. A hierarchical regression examined the predictive nature of GWG expectations for actual GWG. Chi-square significance tests determined whether the accuracy of GWG knowledge differed depending on GWG status and prepregnancy BMI category.
  
  
  RESULTS
  GWG expectations were a significant predictor of weight gain during pregnancy. Women who experienced excessive GWG were more likely to overestimate the minimum amount of weight that they needed to gain to have a healthy baby.
  
  
  CONCLUSIONS
  GWG expectations are predictive of actual GWG, and GWG knowledge among women is generally poor. In particular, overestimating of the minimum amount of weight to gain during pregnancy is associated with excessive GWG. As such, it may be beneficial to design interventions to prevent excessive GWG that targets these cognitions.
authors: School of Psychology, Deakin University, Burwood, Victoria, Australia.
authors: Skye
authors: S
authors: Mcphie
authors: Helen
authors: H
authors: Skouteris
authors: Briony
authors: B
authors: Hill
authors: Melissa
authors: M
authors: Hayden
mesh_terms: D000328:Adult; D015992:Body Mass Index; D005260:Female; D015438:Health Behavior; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D056865:Ideal Body Weight; D009765:Obesity / Q000523:psychology*; D011247:Pregnancy; D013851:Thinness / Q000523:psychology*; D015430:Weight Gain; D055815:Young Adult
keywords: beliefs; knowledge; obesity; pregnancy; weight gain