title: Plasma leptin influences gestational weight gain and postpartum weight retention.
abstract: BACKGROUND
  Leptin, a product of the obese (ob) gene, is released from adipocytes. At the same body mass index, women have higher concentrations than men. Thus, during pregnancy, leptin may influence gestational weight gain and retention of a portion of that gain postpartum.
  
  
  OBJECTIVE
  We examined the relation between plasma leptin at entry to prenatal care and subsequent changes in weight from entry to prenatal care (at 17 wk gestation, baseline) until 6 mo postpartum.
  
  
  METHODS
  This was an observational study of leptin, gestational weight gain, and postpartum weight retention (at 6 wk and 6 mo postpartum) in 103 low-income pregnant women from Camden, NJ, with a pregravid body mass index (in kg/m2) in the normal range (19.8-26).
  
  
  RESULTS
  After potential confounding variables were controlled for, leptin at entry significantly (P < 0.05) predicted weight gain in pregnancy, including measured rate of weight gain (x +/- SEE: 0.25 +/- 0.13 kg x unit log leptin(-1) x wk(-1)), measured rate of third-trimester weight gain (0.37 +/- 0.15 kg x unit log leptin(-1) x wk(-1)), rate of weight gain from recalled pregravid weight (0.23 +/- 0.09 kg x unit log leptin(-1) x wk(-1)), and net rate of gestational weight gain (0.22 +/- 0.09 kg x unit log leptin(-1) x wk(-1)). The leptin concentration at entry also significantly predicted retained weight in the postpartum period (at 6 mo: 7.29 +/- 3.33 kg/unit log leptin at entry) and marginally predicted changes in the sum of skinfold thicknesses (at 6 mo: 14.7 +/- 7.5 mm/unit log leptin at entry).
  
  
  CONCLUSIONS
  These results suggest that a high leptin concentration at entry to prenatal care may predict an increased risk of overweight and obesity in vulnerable women.
authors.affiliation: Department of Surgery, University of Medicine and Dentistry of New Jersey-SOM, Stratford 08084, USA. tpstein@umdnj.edu
authors.forename: T P
authors.initials: TP
authors.lastname: Stein
authors.forename: T O
authors.initials: TO
authors.lastname: Scholl
authors.forename: M D
authors.initials: MD
authors.lastname: Schluter
authors.forename: C M
authors.initials: CM
authors.lastname: Schroeder
mesh_terms: D000293:Adolescent; D000328:Adult; D015992:Body Mass Index; D002149:Energy Intake; D005260:Female; D006801:Humans; D020738:Leptin; D049590:Postpartum Period; D011247:Pregnancy / Q000097:blood*; D011506:Proteins / Q000378:metabolism*; D012885:Skinfold Thickness; D013997:Time Factors; D015430:Weight Gain
chemical_list: D020738:Leptin; D011506:Proteins