title: Empty follicle syndrome after GnRHa triggering versus hCG triggering in COS.
abstract: OBJECTIVE
  This study aimed to explore the incidence of empty follicle syndrome (EFS) in oocyte donors who had final oocyte maturation triggered with GnRHa and to compare the incidence of EFS in this group of patients with IVF patients who had final oocyte maturation with hCG.
  
  
  METHODS
  Data including 2034 oocyte donation cycles and 1433 IVF cycles performed between years 2009 and 2010 was retrospectively analyzed to identify cases of EFS in each group.
  
  
  RESULTS
  The incidence of EFS in the two groups did not differ significantly, 3.5% versus 3.1%, (n.s.).
  
  
  CONCLUSIONS
  This large retrospective analysis indicates that the incidence of EFS is not increased after GnRHa triggering as compared to hCG triggering.
authors.affiliation: FIV Valencia, Santa Rosa 12, 46021 Valencia, Spain. jccastillo@fiv-valencia.es
authors.forename: Juan C
authors.initials: JC
authors.lastname: Castillo
authors.forename: Juan
authors.initials: J
authors.lastname: Garcia-Velasco
authors.forename: Peter
authors.initials: P
authors.lastname: Humaidan
mesh_terms: D000328:Adult; D006063:Chorionic Gonadotropin / Q000009:adverse effects*; D005260:Female; D007987:Gonadotropin-Releasing Hormone / Q000009:adverse effects / Q000031:analogs & derivatives / Q000037:antagonists & inhibitors*; D006727:Hormone Antagonists / Q000009:adverse effects*; D006801:Humans; D015994:Incidence; D007246:Infertility / Q000628:therapy; D018587:Oocyte Donation / Q000009:adverse effects*; D010049:Ovarian Diseases / Q000139:chemically induced* / Q000209:etiology / Q000503:physiopathology; D006080:Ovarian Follicle / Q000187:drug effects* / Q000503:physiopathology; D010062:Ovulation Induction / Q000009:adverse effects*; D011994:Recombinant Proteins / Q000009:adverse effects; D012189:Retrospective Studies; D014019:Tissue Donors; D055815:Young Adult
chemical_list: D006063:Chorionic Gonadotropin; D006727:Hormone Antagonists; D011994:Recombinant Proteins; D007987:Gonadotropin-Releasing Hormone; C061018:ganirelix