title: [Impact of high response of ovary to gonadotropin stimulation on the outcome of in vitro fertilization and embryo transfer or intracytoplasmic sperm injection].
abstract: OBJECTIVE
  To evaluate the impact of elevated peak estradiol (E(2)) levels and a high number of retrieved oocytes on implantation and pregnancy rate in patients undergoing in vitro fertilization-embryo transfer (IVF-ET) and intracytoplasmic sperm injection (ICSI).
  
  
  METHODS
  Retrospectively analyzed 474 infertile women undergoing 510 cycles for IVF-ET/ICSI treatment during the period of March 1999 to December 2000. Using a standard long protocol/flare-up protocol [(gonadotropic hormone releasing hormone agonist/high pure follicle-stimulating hormone (FSH-HP)/human chorionic gonadotropin (hCG)] for ovarian stimulation. High responders were defined as those who had peak E(2) levels of > 11 010 pmol/L on the day of hCG administration (n = 160) or > 15 retrieved oocytes (n = 148). Normal responders were defined as those who had peak E(2) levels of </= 11 010 pmol/L on the day of hCG administration (n = 350) or </= 15 retrieved oocytes (n = 362).
  
  
  RESULTS
  There were statistically significant differences in age, infertile years, basal FSH level and the ampules of FSH-HP required between high and normal responders (P < 0.01 and P < 0.05). Ovarian hyperstimulation syndrome (OHSS) increased significantly in the high responders (P < 0.01). There were no statistically significant differences in implantation rate or pregnancy rate between high and normal responders.
  
  
  CONCLUSIONS
  Elevated peak E(2) levels and high oocytes retrieved were not detrimental to IVF outcome, but had high incidence of OHSS.
authors.affiliation: Reproductive Medicine Unit, First Affiliated Hospital of Wenzhou Medical College, Wenzhou 325000, China.
authors.forename: Jinju
authors.initials: J
authors.lastname: Lin
authors.forename: Bilu
authors.initials: B
authors.lastname: Ye
authors.forename: Junzhao
authors.initials: J
authors.lastname: Zhao
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhou
authors.forename: Xuefeng
authors.initials: X
authors.lastname: Huang
authors.forename: Jufen
authors.initials: J
authors.lastname: Zheng
mesh_terms: D000328:Adult; D006063:Chorionic Gonadotropin / Q000494:pharmacology*; D004624:Embryo Transfer; D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D008297:Male; D016471:Ovarian Hyperstimulation Syndrome / Q000453:epidemiology; D010053:Ovary / Q000187:drug effects* / Q000502:physiology; D012189:Retrospective Studies; D020554:Sperm Injections, Intracytoplasmic
chemical_list: D006063:Chorionic Gonadotropin