title: Pyridostigmine cotreatment for controlled ovarian hyperstimulation in low responders undergoing in vitro fertilization-embryo transfer.
abstract: OBJECTIVE
  To investigate the effect of pyridostigmine, an acetylcholinesterase inhibitor, as cotreatment for controlled ovarian hyperstimulation (COH) in low responders.
  
  
  METHODS
  Randomized, double-blind, placebo-controlled study.
  
  
  METHODS
  A reproductive medicine unit in a university hospital.
  
  
  METHODS
  Seventy infertile women with a history of low ovarian response to COH using a GnRH agonist as part of a long stimulation protocol in previous IVF-ET cycles.
  
  
  METHODS
  Sixty milligrams of pyridostigmine or placebo was administered orally twice daily from the first day of COH until the day of hCG injection in patients undergoing IVF-ET cycles.
  
  
  METHODS
  In vitro fertilization results, pregnancy outcome, and serum and intrafollicular concentrations of GH and insulin-like growth factor-1.
  
  
  RESULTS
  Pyridostigmine cotreatment was associated with significant decreases in the amount of gonadotropins and the duration of stimulation required. The clinical pregnancy rate was higher in the pyridostigmine group, but this difference was not statistically significant (25.7% vs. 11.4%). The serum GH level on the day of hCG injection was significantly higher in the pyridostigmine group than in the placebo group. Follicular fluid concentrations of GH and insulin-like growth factor-1 were significantly higher in the pyridostigmine group.
  
  
  CONCLUSIONS
  This study suggests that pyridostigmine cotreatment for COH could affect the serum and intrafollicular GH and insulin-like growth factor-1 concentrations and, hence, improve the ovarian response to COH and the results of IVF in low responders undergoing IVF-ET.
authors: Department of Obstetrics and Gynecology, College of Medicine, University of Ulsan, Asan Medical Center, Seoul, Korea.
authors: C H
authors: CH
authors: Kim
authors: H D
authors: HD
authors: Chae
authors: Y S
authors: YS
authors: Chang
mesh_terms: D000328:Adult; D002800:Cholinesterase Inhibitors / Q000627:therapeutic use*; D006063:Chorionic Gonadotropin / Q000008:administration & dosage; D004311:Double-Blind Method; D004624:Embryo Transfer; D005260:Female; D005307:Fertilization in Vitro; D015571:Follicular Fluid / Q000737:chemistry; D019382:Human Growth Hormone / Q000032:analysis; D006801:Humans; D007334:Insulin-Like Growth Factor I / Q000032:analysis; D008297:Male; D008875:Middle Aged; D010062:Ovulation Induction; D010919:Placebos; D011247:Pregnancy; D011256:Pregnancy Outcome; D011729:Pyridostigmine Bromide / Q000627:therapeutic use*
chemical_list: D002800:Cholinesterase Inhibitors; D006063:Chorionic Gonadotropin; D010919:Placebos; D019382:Human Growth Hormone; D007334:Insulin-Like Growth Factor I; D011729:Pyridostigmine Bromide