title: Triggering ovulation with gonadotropin-releasing hormone agonists does not compromise embryo implantation rates.
abstract: OBJECTIVE
  To evaluate the implant capacity of embryos derived from oocytes matured with a bolus of GnRH agonist.
  
  
  METHODS
  Donors were randomly assigned to a protocol using either GnRH agonist or recombinant (r) hCG to trigger ovulation. Analysis of variance, Student t test, and Fisher exact test were used where appropriate.
  
  
  METHODS
  Private clinical setting.
  
  
  METHODS
  Young voluntary donors receiving GnRH agonist (n = 30) or rhCG (n = 30). Eighty-nine patients received oocytes.
  
  
  METHODS
  Controlled ovarian stimulation was carried out with GnRH antagonist and FSH/LH in a step-down protocol. Donors received a single bolus of GnRH agonist (0.2 mg) or rhCG (250 microg). The endometrial tissue of recipient patients was prepared with oral E(2) and P.
  
  
  METHODS
  Pregnancy and implantation rates and ovarian hyperstimulation syndrome (OHSS) in an IVF donor program.
  
  
  RESULTS
  No significant differences in the number of retrieved oocytes (327 vs. 288), MII oocytes (70% vs. 76%), fertilization (80% vs. 65%,), pregnancy/transfer (55% vs. 59%), and implantation rates (29% vs. 32%) were found between recipients whose embryos originated from donors in whom final oocyte maturation was triggered with GnRH agonist and those whose donors received hCG. Significant differences in luteal phase length (4.16 + 0.70 days vs. 13.63 + 2.12 days) and in OHSS (0/30 vs. 5/30) were seen between donors ovulated with the agonist and the donors in whom ovulation was triggered with hCG.
  
  
  CONCLUSIONS
  In controlled ovarian stimulation IVF donor cycles, GnRH agonists trigger ovulation and induce luteolysis but do not compromise embryo implantation capacity.
authors.affiliation: Clinica de Medicina de la Reproduccion y Ginecologia FivMadrid, Madrid, Spain.
authors.forename: Belen
authors.initials: B
authors.lastname: Acevedo
authors.forename: Jose Luis
authors.initials: JL
authors.lastname: Gomez-Palomares
authors.forename: Elisabetta
authors.initials: E
authors.lastname: Ricciarelli
authors.forename: Eleuterio R
authors.initials: ER
authors.lastname: Hernández
mesh_terms: D000328:Adult; D010064:Embryo Implantation / Q000187:drug effects*; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods*; D007987:Gonadotropin-Releasing Hormone / Q000819:agonists*; D006801:Humans; D007247:Infertility, Female / Q000628:therapy*; D010062:Ovulation Induction / Q000379:methods*; D011247:Pregnancy; D011256:Pregnancy Outcome; D016896:Treatment Outcome; D017329:Triptorelin Pamoate / Q000008:administration & dosage*
chemical_list: D017329:Triptorelin Pamoate; D007987:Gonadotropin-Releasing Hormone