title: Preretrieval predictors of pregnancy in IVF.
abstract: OBJECTIVE
  This study was designed to evaluate the predictive value of preretrieval parameters of ovarian stimulation in patients undergoing IVF-ET.
  
  
  METHODS
  Women diagnosed with infertility due to tubal factor were compared to women with other and/or multiple diagnoses. Stepwise logistic regression evaluated 389 cycles to identify the best predictors of pregnancy among the following variables: age, primary or secondary infertility, cycle number, type and dose of gonadotropin, duration of gonadotropin administration, serum estradiol level, and number and size of follicles.
  
  
  RESULTS
  In the tubal disease group, probability of pregnancy was greater in cycles with serum estradiol levels below 1100 pg/ml on the day of hCG (odds ratio, 4.7) and with administration of gonadotropins for less than 10 days (odds ratio, 3.7). In contrast, in the other/mixed diagnoses group, a serum estradiol below 1100 pg/ml was associated with a decreased probability of pregnancy (odds ratio, 0.6).
  
  
  CONCLUSIONS
  Optimal parameters of ovarian stimulation may vary according to the etiology of infertility. In patients with tubal disease, the beneficial effects of greater stimulation, and thus the greater number of available oocytes, may be offset by adverse effects on the endometrium and on the quality of oocytes and embryos. In contrast, in other diagnostic groups, the advantage of an increased number of oocytes may outweigh the potential adverse effects of prolonged stimulation and higher estradiol levels.
authors.affiliation: Department of Obstetrics and Gynecology, Yale University School of Medicine, New Haven, Connecticut 06520, USA.
authors.forename: A J
authors.initials: AJ
authors.lastname: Duleba
authors.forename: N
authors.initials: N
authors.lastname: Hausman
authors.forename: E E
authors.initials: EE
authors.lastname: Jones
authors.forename: D L
authors.initials: DL
authors.lastname: Olive
mesh_terms: D006063:Chorionic Gonadotropin / Q000008:administration & dosage; D004624:Embryo Transfer; D004958:Estradiol / Q000097:blood*; D005184:Fallopian Tube Diseases / Q000097:blood; D005260:Female; D005306:Fertilization; D005307:Fertilization in Vitro; D006801:Humans; D007247:Infertility, Female / Q000097:blood / Q000209:etiology; D008423:Maternal Age; D016017:Odds Ratio; D010053:Ovary / Q000187:drug effects / Q000502:physiology; D010062:Ovulation Induction; D011237:Predictive Value of Tests; D011247:Pregnancy; D018873:Pregnancy Rate; D012044:Regression Analysis
chemical_list: D006063:Chorionic Gonadotropin; D004958:Estradiol