title: The concentration of inhibin B in follicular fluid: relation to oocyte maturation and embryo development.
abstract: BACKGROUND
  The objective of the present study was to investigate the correlation between inhibin B and estradiol levels in follicular fluid (FF) with the quality of subsequent embryo development from in-vitro fertilized oocytes aspirated from the same follicle.
  
  
  METHODS
  A total of 156 infertile women undergoing controlled ovarian stimulation for IVF and embryo transfer was recruited to the present study. Prospectively, 233 FF samples and matched mature oocytes were studied. Concentrations of inhibin B and estradiol were determined by enzyme-linked immunosorbent assay (ELISA) and immunofluorometric assay (IFMA) respectively.
  
  
  RESULTS
  Inhibin B levels in FF were significantly correlated with embryo scores on days 2 and 3 (48 and 72 h after oocyte retrieval). In contrast, both inhibin B and estradiol levels in FF were inversely related to age. Furthermore, FF inhibin B levels were inversely associated with serum FSH levels on day 3 of the menstrual cycle, which was believed to reflect the ovarian reserve.
  
  
  CONCLUSIONS
  Inhibin B in FF may serve as an effective marker of follicular development and a useful predictor of quality of embryo. In addition, quality of oocyte is age-related and declines as age increases.
authors.affiliation: Department of Obstetrics and Gynaecology, Chang-Gung Memorial Hospital, Lin-Kou Medical Centre, Taipei, Taiwan, Republic of China.
authors.forename: Chia-Lin
authors.initials: CL
authors.lastname: Chang
authors.forename: Tzu-Hao
authors.initials: TH
authors.lastname: Wang
authors.forename: Shang-Gwo
authors.initials: SG
authors.lastname: Horng
authors.forename: Hsien-Ming
authors.initials: HM
authors.lastname: Wu
authors.forename: Hsin-Shih
authors.initials: HS
authors.lastname: Wang
authors.forename: Yung-Kuei
authors.initials: YK
authors.lastname: Soong
mesh_terms: D000328:Adult; D016922:Cellular Senescence / Q000502:physiology; D005314:Embryonic and Fetal Development / Q000502:physiology*; D004958:Estradiol / Q000378:metabolism; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood; D015571:Follicular Fluid / Q000378:metabolism*; D006801:Humans; D007265:Inhibins / Q000378:metabolism*; D008597:Menstrual Cycle / Q000097:blood; D009865:Oocytes / Q000502:physiology*
chemical_list: C422364:inhibin B; D004958:Estradiol; D007265:Inhibins; D005640:Follicle Stimulating Hormone