title: Is a lower dose of cetrorelix acetate effective for prevention of LH surge during controlled ovarian hyperstimulation?
abstract: OBJECTIVE
  This study was performed to evaluate whether a lower dose (0.2 mg) of cetrorelix would prevent premature LH surge in patients undergoing controlled ovarian hyperstimulation.
  
  
  METHODS
  Controlled ovarian hyperstimulation was carried out in 45 patients, starting on menstrual cycle day 3 with recombinant FSH (r-FSH), and a cetrorelix of 0.2 mg was administered from day 5 evening of ovarian stimulation until the day before hCG injection.
  
  
  RESULTS
  There was a statistically significant decrease in serum LH level one day after the first cetrorelix injection and on the day of hCG administration. Serum LH concentrations were maintained constantly low during the follicular phase with no premature LH surge occurring in any of the patients. Clinical pregnancy was achieved for 18 women (40%), with one of these experiencing intrauterine fetal death before 12 week' gestation.
  
  
  CONCLUSIONS
  This study demonstrates that a daily dose of cetrorelix 0.2 mg is able to prevent premature LH surge.
authors.affiliation: Department of Obstetrics and Gynecology, Shin Kong Wu Ho-Su Memorial Hospital, Shih Lin District, Taipei, 111, Taiwan.
authors.forename: Heng-Ju
authors.initials: HJ
authors.lastname: Chen
authors.forename: Yu-Hung
authors.initials: YH
authors.lastname: Lin
authors.forename: Bih-Chwen
authors.initials: BC
authors.lastname: Hsieh
authors.forename: Kok-Min
authors.initials: KM
authors.lastname: Seow
authors.forename: Jiann-Loung
authors.initials: JL
authors.lastname: Hwang
authors.forename: Chii-Ruey
authors.initials: CR
authors.lastname: Tzeng
mesh_terms: D000328:Adult; D004305:Dose-Response Relationship, Drug; D004624:Embryo Transfer; D004958:Estradiol / Q000097:blood; D005260:Female; D005300:Fertility Agents, Female / Q000008:administration & dosage* / Q000627:therapeutic use; D007987:Gonadotropin-Releasing Hormone / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000037:antagonists & inhibitors / Q000627:therapeutic use; D006801:Humans; D007986:Luteinizing Hormone / Q000097:blood*; D010062:Ovulation Induction / Q000379:methods*; D011247:Pregnancy; D018873:Pregnancy Rate
chemical_list: D005300:Fertility Agents, Female; D007987:Gonadotropin-Releasing Hormone; D004958:Estradiol; D007986:Luteinizing Hormone; C062876:cetrorelix