title: Comparison of GnRH antagonists and flareup GnRH agonists in donor oocyte cycles.
abstract: OBJECTIVE
  To compare the flareup GnRH-antagonist (GnRH-ant) and GnRH-agonist (GnRH-a) protocols in oocyte donation cycles, using the donor as her own control.
  
  
  METHODS
  A retrospective review at a university-based practice of 22 oocyte donors who underwent 29 cycles using recombinant follicle-stimulating hormone (FSH) and GnRH-ant and 28 cycles using flareup GnRH-a with recombinant FSH. Recipients (n=57) were synchronized with estrogen and progesterone supplementation.
  
  
  RESULTS
  The total number of recombinant FSH used and days of stimulation were similar between the groups; however, cycle days 5 estradiol (341 +/- 40 vs. 473 +/- 62 pg/mL), peak serum estradiol (1721 +/- 170 vs. 3625 +/- 295 pg/mL) and the number of retrieved MII oocytes (17 +/- 1.5 vs. 29 +/- 7) were significantly higher in the flareup GnRH-a group. Similar fertilization rates, embryos transferred, clinical pregnancy rate/embryo transfer (44%, 11/25; vs. 55%, 15/27), delivered pregnancy rate/embryo transfer (32%, 8/25; vs. 52%, 14/27) and implantation rates (31 +/- 6% vs. 28 +/- 5%) were seen in each group.
  
  
  CONCLUSIONS
  Both the flareup GnRH-a and GnRH-ant are shortened, simplified and efficacious protocols in oocyte donation cycles.
authors.affiliation: Department of Obstetrics, University of Oklahoma, Oklahoma City, USA.
authors.forename: Alex Y
authors.initials: AY
authors.lastname: Wei
authors.forename: Katherine A
authors.initials: KA
authors.lastname: Mijal
authors.forename: Mindy S
authors.initials: MS
authors.lastname: Christianson
authors.forename: Calisa M
authors.initials: CM
authors.lastname: Schouweiler
authors.forename: Steven R
authors.initials: SR
authors.lastname: Lindheim
mesh_terms: D000328:Adult; D010064:Embryo Implantation; D004958:Estradiol / Q000097:blood; D005260:Female; D005307:Fertilization in Vitro; D005640:Follicle Stimulating Hormone / Q000494:pharmacology; D007987:Gonadotropin-Releasing Hormone / Q000819:agonists* / Q000037:antagonists & inhibitors*; D006727:Hormone Antagonists / Q000008:administration & dosage; D006801:Humans; D008875:Middle Aged; D018587:Oocyte Donation; D010062:Ovulation Induction / Q000379:methods*; D011247:Pregnancy; D012189:Retrospective Studies
chemical_list: D006727:Hormone Antagonists; D007987:Gonadotropin-Releasing Hormone; D004958:Estradiol; D005640:Follicle Stimulating Hormone