title: Superior analytic characteristics of an immunometric assay for gonadotropins also provides useful clinical prediction of in vitro fertilization outcomes.
abstract: OBJECTIVE
  To determine whether an analytically superior gonadotropin assay, the monoclonal, two-site immunometric assay, also provided superior prediction of clinical outcomes when compared with conventional RIA methodology.
  
  
  METHODS
  Methods comparison study.
  
  
  METHODS
  Tertiary academic center.
  
  
  METHODS
  One hundred fifty-seven consecutive IVF patients.
  
  
  METHODS
  Comparisons of FSH and LH levels on cycle day 3 were made using paired RIA and immunometric assay procedures. The ability of day 3 LH, FSH, and their ratio in predicting IVF performance was determined using regression analyses.
  
  
  RESULTS
  The predictive ability of FSH as assayed by immunometric assay at least equaled that obtained by RIA for both peak E2 levels and the number of mature oocytes retrieved.
  
  
  CONCLUSIONS
  Results from this study indicate that gonadotropin levels as measured by immunometric assay represent an effective clinical tool in predicting IVF outcomes that may prove superior to RIA.
authors.affiliation: Jones Institute for Reproductive Medicine, Department of Obsetrics and Gynecology, Eastern Virginia Medical School, Norfolk, USA.
authors.forename: J W
authors.initials: JW
authors.lastname: Ramey
authors.forename: H J
authors.initials: HJ
authors.lastname: Seltman
authors.forename: J P
authors.initials: JP
authors.lastname: Toner
mesh_terms: D004958:Estradiol / Q000097:blood*; D005260:Female; D005307:Fertilization in Vitro; D005640:Follicle Stimulating Hormone / Q000097:blood*; D005544:Forecasting; D006801:Humans; D015592:Immunoradiometric Assay; D007986:Luteinizing Hormone / Q000097:blood*; D011237:Predictive Value of Tests; D011863:Radioimmunoassay; D012044:Regression Analysis; D016896:Treatment Outcome
chemical_list: D004958:Estradiol; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone