Morphological differences in human zygotes and embryos cultured in different media / Efeito de quatro diferentes meios de cultura na qualidade morfologica de zigotos e embriões

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

Objective: compare the effects of four different culture media on the quality of zygotes and embryos. Methods: This retrospective study, performed at the Center for Human Reproduction of Campinas-Brazil analyzed 2289 embryos were assessed from September 2006 to September 2008. Long protocol was used for ovarian stimulation in all cases. The oocytes of each patient were cultivated in two different culture media. The medium HTF - Irvine was set as the default for all cycles and IVF Medium - Medicult, GGG 20 - Global and IVF 30 - Vitrolife defined as secondary media. The sibling oocytes were divided in the two culture media after ICSI. The confirmation of fertilization and classification as described by Gianaroli were evaluated 18-20 hours after ICSI. On the second day (day 2) of development, the embryos were evaluated according the number of cells, percentage of fragmentation and number of nuclei. On day 2, the embryos that had four cells with less than 20% of fragmentation and were mononucleated embryos were classified as Top. Z-test and Odds ratios were used for statistical analysis. Results: IVF-30 showed a higher percentage (55.2) of zygotes A1 + A2 when compared to HTF, Global and Universal IVF Medium media (49.1%; 44.7%; 44.2% respectively) The percentage of Top embryos was significantly higher in Global medium (40.4%) compared to HTF (21.1%), IVF-30 (25.0%) and Universal IVF medium (11.1%). On day 2 Universal IVF Medium produced more embryos with three blastomeres when compared to other media that produced more embryos with four blastomeres. Conclusions: The use of IVF- 30 medium resulted in a higher number of zygotes with centralized pronuclei with juxtaposed or scattered nucleoli. Meanwhile, Global medium produced a greater number of morphologically good embryos (TOP) and higher cleavage rate on the second day of development

ASSUNTO(S)

culture media desenvolvimento embrionario embryonic development zygote cultura e meios de cultura (biologia) zigoto

ACESSO AO ARTIGO

Documentos Relacionados