title: High FSH:LH ratio and low LH levels in basal cycle day 3: impact on follicular development and IVF outcome.
abstract: OBJECTIVE
  To examine the impact of low basal cycle day 3 serum LH levels or a high FSH:LH ratio on IVF results.
  
  
  METHODS
  A homogeneous group of patients was analyzed as identified by normal basal cycle of follicle stimulating hormone (FSH), Luteinizing hormone (LH), and estradiol (E2) levels. High responders (high LH:FSH ratio) and low responders (high FSH or E2 levels, and women > or = 42 years of age) were excluded from analysis. Only cycles stimulated with a combination of a GnRHa (luteal suppression) and pure FSH were studied.
  
  
  RESULTS
  Patients with low basal LH levels (< 3 mIU/mL) did not differ significantly from controls in terms of response to controlled ovarian hyperstimulation but there was a clear trend toward poorer implantation and clinical pregnancy rates. On the other hand, patients with a high FSH:LH ratio (> 3) had significantly fewer mature oocytes aspirated, and lower implantation and clinical pregnancy rates than patients with gonadotropin ratio < or = 3. These negative effects were evident in the presence of normal basal FSH levels and after adequate matching of female's age and number of embryos transferred.
  
  
  CONCLUSIONS
  These studies highlight a negative impact of a basal cycle high FSH:LH ratio (and possibly low LH levels) on follicular development and oocyte quality in these patients subjected to pituitary down-regulation followed by pure FSH administration. A high FSH:LH ratio may be therefore used as an early biomarker of poor ovarian response.
authors.affiliation: Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Norfolk, Virginia, USA.
authors.forename: G
authors.initials: G
authors.lastname: Barroso
authors.forename: S
authors.initials: S
authors.lastname: Oehninger
authors.forename: A
authors.initials: A
authors.lastname: Monzó
authors.forename: P
authors.initials: P
authors.lastname: Kolm
authors.forename: W E
authors.initials: WE
authors.lastname: Gibbons
authors.forename: S J
authors.initials: SJ
authors.lastname: Muasher
mesh_terms: D000328:Adult; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood*; D006801:Humans; D007986:Luteinizing Hormone / Q000097:blood*; D006080:Ovarian Follicle / Q000502:physiology*; D010062:Ovulation Induction / Q000379:methods*; D011247:Pregnancy; D018873:Pregnancy Rate; D012189:Retrospective Studies; D016896:Treatment Outcome
chemical_list: D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone