title: High basal estradiol level and FSH/LH ratio in unexplained recurrent pregnancy loss.
abstract: BACKGROUND
  The potential role of diminished ovarian reserve in unexplained recurrent pregnancy loss (RPL) in a retrospective comparative analysis.
  
  
  METHODS
  Eighty women with RPL underwent routine work-up to exclude known associations of RPL. Serum FSH, LH and E(2) levels were assessed on the 3rd day of the menstrual cycle. Following investigation, 58 women failed to reveal an identifiable cause and are therefore classified as unexplained RPL. Control group consisted of women in whom the cause of abortions was known such as uterine septum and parental chromosomal abnormalities. Mean age, gravidity, parity, presence of infertility, previous number of miscarriages, duration of marriage were similar in both groups. Day 3 serum levels of FSH, E(2) and FSH: LH ratios were compared in the two groups.
  
  
  RESULTS
  Elevated FSH concentrations were equally distributed in the unexplained RPL and control groups. Both day 3 E(2) and FSH:LH ratio were elevated in the unexplained RPL group compared with the control group ( p=0.0066 and p=0.0187 respectively). The percentage of women with elevated FSH and/or E(2) levels on day 3 were significantly higher in the unexplained RPL group than in controls ( p=0.0045).
  
  
  CONCLUSIONS
  Unexplained RPL may be associated with diminished ovarian reserve and should be considered in the workup of RPL.
authors.affiliation: Department of Reproductive Endocrinology and Infertility, Zeynep Kamil Women and Children Education and Research Hospital, Istanbul, Turkey. ahmetgurbuz2002@yahoo.com
authors.forename: Birgül
authors.initials: B
authors.lastname: Gürbüz
authors.forename: Serap
authors.initials: S
authors.lastname: Yalti
authors.forename: Selcuk
authors.initials: S
authors.lastname: Ozden
authors.forename: Cem
authors.initials: C
authors.lastname: Ficicioglu
mesh_terms: D000026:Abortion, Habitual / Q000097:blood* / Q000453:epidemiology* / Q000209:etiology; D000328:Adult; D016022:Case-Control Studies; D004958:Estradiol / Q000097:blood; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood; D006801:Humans; D007986:Luteinizing Hormone / Q000097:blood; D008499:Medical Records; D008597:Menstrual Cycle / Q000097:blood; D011247:Pregnancy; D012189:Retrospective Studies
chemical_list: D004958:Estradiol; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone