title: Use of gonadotropin-releasing hormone antagonists to overcome the drawbacks of intrauterine insemination on weekends.
abstract: OBJECTIVE
  To assess the usefulness of the GnRH antagonist cetrorelix to prevent LH surge and to avoid intrauterine insemination at weekends when a gynecologist on duty is not available and the ultrasound scan on Friday showed > 1 and < 3 follicles > or = 17 mm in diameter.
  
  
  METHODS
  Open-label, randomized, prospective study.
  
  
  METHODS
  Reproductive medicine unit in an acute care teaching hospital in Barcelona, Spain.
  
  
  METHODS
  Infertile patients undergoing controlled ovarian hyperstimulation (COH) and IUI.
  
  
  METHODS
  Treatment with recombinant FSH was started on day 3. In women assigned to the control group (n = 32), recombinant FSH was continued up to the day of hCG administration. In patients assigned to the GnRH antagonist group (n = 35), half of the dose of recombinant FSH was given for 2 more days in addition to cetrorelix (0.25 mg SC) until the day of hCG administration.
  
  
  METHODS
  Recombinant FSH doses, E(2) level on the day of hCG administration, number and diameter of follicles, endometrial thickness, and number of pregnancies.
  
  
  RESULTS
  Only a case of premature ovulation occurred in the cetrorelix group. There were no significant differences between the study groups in the total mean number of follicles, follicles > 10 mm and < 17 mm, and follicles > or = 17 mm. The mean concentration of E2 on the day of hCG administration and the endometrial thickness were significantly higher in the cetrorelix group. Eleven pregnancies were achieved, 7 (20%) in the cetrorelix group (4 singleton, 3 twins) and 4 (12.5%) in controls (4 singleton). No case of ovarian hyperstimulation syndrome (OHSS) occurred.
  
  
  CONCLUSIONS
  The use of cetrorelix to avoid IUI at weekends when the ultrasound scan on Friday shows > 1 and < 3 follicles > or = 17 mm is a useful alternative for medical centers in which a gynecologist on call is not available.
authors.affiliation: Service of Obstetrics and Gynecology, Hospital Universitari del Mar, Universitat Autónoma de Barcelona, Barcelona, Spain. MAcheca@imas.imim.es
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Checa
authors.forename: María
authors.initials: M
authors.lastname: Prat
authors.forename: Ana
authors.initials: A
authors.lastname: Robles
authors.forename: Ramón
authors.initials: R
authors.lastname: Carreras
mesh_terms: D000328:Adult; D001071:Appointments and Schedules; D006063:Chorionic Gonadotropin / Q000627:therapeutic use; D004305:Dose-Response Relationship, Drug; D004334:Drug Administration Schedule; D004359:Drug Therapy, Combination; D004717:Endometrium / Q000000981:diagnostic imaging; D004958:Estradiol / Q000097:blood; D005260:Female; D005640:Follicle Stimulating Hormone / Q000008:administration & dosage / Q000627:therapeutic use; D007987:Gonadotropin-Releasing Hormone / Q000031:analogs & derivatives* / Q000037:antagonists & inhibitors* / Q000627:therapeutic use; D006727:Hormone Antagonists / Q000627:therapeutic use*; D006801:Humans; D007246:Infertility / Q000628:therapy*; D007315:Insemination, Artificial; D007986:Luteinizing Hormone / Q000037:antagonists & inhibitors*; D006080:Ovarian Follicle / Q000000981:diagnostic imaging*; D011247:Pregnancy; D018873:Pregnancy Rate; D011994:Recombinant Proteins / Q000008:administration & dosage / Q000627:therapeutic use; D014463:Ultrasonography
chemical_list: D006063:Chorionic Gonadotropin; D006727:Hormone Antagonists; D011994:Recombinant Proteins; D007987:Gonadotropin-Releasing Hormone; D004958:Estradiol; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone; C062876:cetrorelix