title: Long GnRH-agonist protocol in an IVF program. Is it appropriate for women with normal FSH levels and high FSH/LH ratios?
abstract: OBJECTIVE
  To determine whether subjects with an elevated ratio of follicle-stimulating hormone (FSH) to luteinizing hormone (LH) but normal basal FSH levels should be regarded as poor responders to controlled ovarian hyperstimulation.
  
  
  METHODS
  One hundred twenty-five women undergoing in vitro fertilization (IVF) for the first time were recruited in this retrospective cohort study. Women over 40 years old or having serum basal FSH > 10 mIU/mL were excluded.
  
  
  RESULTS
  Various cutoff values for the FSH/LH ratio were chosen, and the ratio demonstrated that pregnancy rates were apparently higher in patients with the long protocol than with the short one if they had an FSH/LH ratio < 3.0 (48.5% vs. 25.8%, P = .034), < 2.5 (53.3% vs. 28.6%, P = .030) or < 2.0 (57.8% vs. 21.7%, P = .005). Pregnancy rates were similar with the long and short protocols in patients with FSH/LH > or = 3.0 (57.1% vs. 70%, P = .521), FSH/LH > or = 2.5 (40% vs. 53.8%, P = .435) or FSH/LH > or = 2.0 (40% vs. 55.6%, P = .281).
  
  
  CONCLUSIONS
  This study failed to demonstrate that FSH/LH was a useful parameter for predicting reproductive outcome in IVF programs and for patient selection for the long or short gonadotropin-releasing hormone agonist protocol.
authors.affiliation: Department of Obstetrics and Gynecology, College of Medicine, National Taiwan University, Taipei, R.O.C.
authors.forename: J H
authors.initials: JH
authors.lastname: Yang
authors.forename: M Y
authors.initials: MY
authors.lastname: Wu
authors.forename: K H
authors.initials: KH
authors.lastname: Chao
authors.forename: S U
authors.initials: SU
authors.lastname: Chen
authors.forename: H N
authors.initials: HN
authors.lastname: Ho
authors.forename: Y S
authors.initials: YS
authors.lastname: Yang
mesh_terms: D002064:Buserelin / Q000008:administration & dosage* / Q000627:therapeutic use; D015331:Cohort Studies; D004624:Embryo Transfer; D005260:Female; D005307:Fertilization in Vitro; D005640:Follicle Stimulating Hormone / Q000097:blood*; D006801:Humans; D007986:Luteinizing Hormone / Q000097:blood*; D010062:Ovulation Induction; D011247:Pregnancy; D012189:Retrospective Studies
chemical_list: D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone; D002064:Buserelin