title: Improved monofollicular ovulation in anovulatory or oligo-ovulatory women after a low-dose step-up protocol with weekly increments of 25 international units of follicle-stimulating hormone.
abstract: OBJECTIVE
  To compare the effectiveness and efficiency of two low-dose step-up protocols for ovulation induction in women with anovulatory infertility (World Health Organization group II).
  
  
  METHODS
  Open-label, prospective, randomized, group-comparative, multicenter study.
  
  
  METHODS
  Eighteen infertility centers in Europe and Canada.
  
  
  METHODS
  One hundred fifty-eight anovulatory or oligo-ovulatory infertile women.
  
  
  METHODS
  Patients were randomly assigned to one of two protocols for one cycle of follitropin beta (rFSH) using a pen device. The starting dosage was 50 IU/day for 7 days. In the absence of follicles > or =12 mm, the daily dosage was increased by either 25 or 50 IU per week.
  
  
  METHODS
  The percentage of all subjects treated who ovulated after one treatment cycle (efficacy) and the total rFSH dose to reach ovulation (efficiency).
  
  
  RESULTS
  The 25-IU group had a higher incidence of monofollicular growth (41.3% of 80 vs. 21.8% of 78 women) and ovulation (81.3% vs. 60.3%), a lower cumulative rFSH dose (887 IU vs. 984 IU), and fewer cancellations due to hyperresponse (>3 follicles > or =15 mm; 5.0% vs. 20.5%). Both protocols were well tolerated.
  
  
  CONCLUSIONS
  Weekly increments of 25 IU in the daily dose were more effective and efficient than 50-IU increments.
authors.affiliation: The Ottawa Fertility Centre, Division of Reproductive Medicine, Department of Obstetrics and Gynecology, Faculty of Medicine, University of Ottawa, Ontario, Canada. aleader@conceive.ca
authors.forename: A
authors.initials: A
authors.lastname: Leader
mesh_terms: D000293:Adolescent; D000328:Adult; D000858:Anovulation / Q000453:epidemiology* / Q000517:prevention & control*; D002170:Canada / Q000453:epidemiology; D015331:Cohort Studies; D015897:Comorbidity; D004305:Dose-Response Relationship, Drug; D004334:Drug Administration Schedule; D005060:Europe / Q000453:epidemiology; D005260:Female; D005640:Follicle Stimulating Hormone / Q000008:administration & dosage*; D006801:Humans; D015994:Incidence; D007247:Infertility, Female / Q000188:drug therapy* / Q000453:epidemiology*; D010060:Ovulation / Q000187:drug effects; D010061:Ovulation Detection / Q000706:statistics & numerical data; D010062:Ovulation Induction / Q000379:methods* / Q000706:statistics & numerical data*; D016896:Treatment Outcome
chemical_list: D005640:Follicle Stimulating Hormone