title: GnRH agonist protocol administration in the luteal phase in ICSI-ET cycles stimulated with the long GnRH agonist protocol: a randomized, controlled double blind study.
abstract: BACKGROUND
  GnRH agonist administration in the luteal phase was reported to beneficially affect the clinical outcome of intracytoplasmic sperm injection (ICSI) and embryo transfer (ET) cycles. This double blind, randomized, placebo controlled trial evaluates whether a single dose GnRH agonist administered 6 days after ICSI increases ongoing pregnancy rates following ET in cycles stimulated with the long GnRH agonist protocol.
  
  
  METHODS
  Five hundred and seventy women undergoing ET following controlled ovarian stimulation with a long GnRH agonist protocol were included. In addition to routine luteal phase support with progesterone, women were randomized to receive a single 0.1 mg dose of triptorelin or placebo 6 days after ICSI. Randomization was done on the day of ET according to a computer generated randomization table. Ongoing pregnancy rate beyond 20th week of gestation was the primary outcome measure. The trial was powered to detect a 12% absolute increase from an assumed 38% ongoing pregnancy rate in the placebo group, with an alpha error level of 0.05 and a beta error level of 0.2.
  
  
  RESULTS
  There were 89 (31.2%) ongoing pregnancies in the GnRH agonist group, and 84 (29.5%) in the control group (absolute difference +1.7%, 95% confidence interval -5.8% to +9.2%). Implantation, clinical pregnancy and multiple pregnancy rates were likewise similar in the GnRH agonist and placebo groups.
  
  
  CONCLUSIONS
  Single 0.1 mg triptorelin administration 6 days after ICSI following ovarian stimulation with the long GnRH agonist protocol does not seem to result in an increase >or=12% in ongoing pregnancy rates.
authors.affiliation: Assisted Reproduction Unit, American Hospital of Istanbul, Guzelbahce Sokak No. 20, Nisantasi, Istanbul 34365, Turkey. barisata@hotmail.com
authors.forename: B
authors.initials: B
authors.lastname: Ata
authors.forename: K
authors.initials: K
authors.lastname: Yakin
authors.forename: B
authors.initials: B
authors.lastname: Balaban
authors.forename: B
authors.initials: B
authors.lastname: Urman
mesh_terms: D000328:Adult; D004311:Double-Blind Method; D004624:Embryo Transfer / Q000379:methods*; D005260:Female; D007987:Gonadotropin-Releasing Hormone / Q000819:agonists*; D006801:Humans; D008183:Luteal Phase / Q000187:drug effects*; D011247:Pregnancy; D018873:Pregnancy Rate; D020554:Sperm Injections, Intracytoplasmic / Q000379:methods*; D017329:Triptorelin Pamoate / Q000627:therapeutic use*
chemical_list: D017329:Triptorelin Pamoate; D007987:Gonadotropin-Releasing Hormone