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J Assist Reprod Genet. 2014 Aug;31(8):1053-7. doi: 10.1007/s10815-014-0270-8. Epub 2014 Jun 22.

The efficiency of a donor-recipient program using infertile donors' egg cryo-banking: a Brazilian reality.

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Fertility - Centro de Fertilização Assistida, Av. Brigadeiro Luis Antonio 4545, São Paulo, SP, 01401-002, Brazil.



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.


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.


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 %.


New and reassuring information derived from our egg-donation program demonstrates outcomes similar to those reported for other egg donation programs.

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