title: Hypogonadotropic hypogonadism in obese women after biliopancreatic diversion.
abstract: OBJECTIVE
  To evaluate a particular form of weight-related amenorrhea occurring in severely obese patients after biliopancreatic diversion, a surgical procedure designed to cause weight loss.
  
  
  METHODS
  Prospective, open, controlled clinical trial.
  
  
  METHODS
  Department of Gynecology and Obstetrics, University of Naples "Federico II", Naples, Italy. The surgical procedures were performed in various hospitals in the Naples metropolitan area.
  
  
  METHODS
  Eight severely obese women (mean [+/-SD] age, 26.9+/-5.3 years) who underwent biliopancreatic diversion (group A) and eight healthy women of normal weight (mean [+/-SD] age, 25.8+/-5.6 years) (group B).
  
  
  METHODS
  Biliopancreatic diversion, hormonal evaluation, and LH pulsatility evaluation.
  
  
  METHODS
  Weight parameters, hormone levels, and LH pulsatility amplitude and frequency before surgery and at the onset of amenorrhea after surgery, and the response of LH pulsatility to the infusion of naloxone at the onset of amenorrhea.
  
  
  RESULTS
  All patients lost weight after surgery and became amenorrheic after 3 months, when they had lost 25% of their basal weight but were still obese. The hormonal picture at that time was one of hypothalamic amenorrhea with significantly reduced LH pulsatility frequency and amplitude. The alterations in LH pulsatility were not modified by naloxone infusion.
  
  
  CONCLUSIONS
  Obese patients who undergo dramatic weight loss may be affected by hypothalamic amenorrhea when still obese. Endogenous opioid activity does not play a significant role in this kind of hypogonadotropic hypogonadism.
authors.affiliation: Department of Obstetrics and Gynecology, University of Naples Federico II, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Di Carlo
authors.forename: S
authors.initials: S
authors.lastname: Palomba
authors.forename: M
authors.initials: M
authors.lastname: De Fazio
authors.forename: M
authors.initials: M
authors.lastname: Gianturco
authors.forename: M
authors.initials: M
authors.lastname: Armellino
authors.forename: C
authors.initials: C
authors.lastname: Nappi
mesh_terms: D000328:Adult; D000568:Amenorrhea / Q000209:etiology*; D015904:Biliopancreatic Diversion / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007006:Hypogonadism / Q000209:etiology*; D007986:Luteinizing Hormone / Q000378:metabolism; D012016:Reference Values; D012636:Secretory Rate
chemical_list: D007986:Luteinizing Hormone