title: The efficiency of a donor-recipient program using infertile donors' egg cryo-banking: a Brazilian reality.
abstract: OBJECTIVE
  To determine whether Brazilian egg donation treatment outcomes with oocytes donated from infertile couples are equivalent to those obtained worldwide with oocytes donated from fertile egg-donors.
  
  
  METHODS
  In this descriptive study, egg-donation cycles from 259 women, performed from January 2009 to July 2013, were evaluated. Oocytes were obtained from patients undergoing ICSI who decided to donate their surplus oocytes. We described the survival, fertilization, blastocyst, implantation and pregnancy rates obtained in our infertile donor-recipient program. In addition, we described the results obtained in previous published studies.
  
  
  RESULTS
  In our egg-donation program we obtained a fertilization rate of 72.9 %, a blastocyst formation rate of 53.2 %, an implantation rate of 31.1 % and the estimated clinical pregnancy rate per warmed oocyte was 5.4 %. The analyzed studies, performed between 2008 and 2013, included varying numbers of egg-donors (range: 20-600), warmed oocytes (range: 123-3826) and survival rates (range: 85.6-92.5 %). Fertilization rates ranged from 74.2 to 87.0 %, blastocyst formation rate ranged from 41.3 % to 68.0 %, implantation rates ranged from 24.7 % to 55.3 % and the clinical pregnancy rate per warmed oocyte ranged from 3.9 % to 9.8 %.
  
  
  CONCLUSIONS
  New and reassuring information derived from our egg-donation program demonstrates outcomes similar to those reported for other egg donation programs.
authors: Fertility - Centro de Fertilização Assistida, Av. Brigadeiro Luis Antonio 4545, São Paulo, SP, 01401-002, Brazil.
authors: Rita de Cássia Sávio
authors: Rde C
authors: Figueira
authors: Amanda S
authors: AS
authors: Setti
authors: Daniela P A F
authors: DP
authors: Braga
authors: Assumpto
authors: A
authors: Iaconelli
authors: Edson
authors: E
authors: Borges
mesh_terms: D000328:Adult; D001938:Brazil; D015925:Cryopreservation; D010064:Embryo Implantation; D004624:Embryo Transfer; D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D007247:Infertility, Female; D018587:Oocyte Donation; D009865:Oocytes / Q000166:cytology* / Q000637:transplantation*; D011247:Pregnancy; D018873:Pregnancy Rate; D014015:Tissue Banks; D009927:Tissue and Organ Procurement; D055815:Young Adult