Morphological differences in human zygotes and embryos cultured in different media.

Raquel Di Falco Cossiello, Alexandros Aggelis, Daniel Faúndes, Carlos A Petta

Campinas Center of Human Reproduction, Campinas, São Paulo, Brazil.

Zygote (Cambridge, England) 2012 Nov

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To compare the effects of four culture media on the quality of human zygotes and embryos. Prospective study analyzing 2289 human embryos cultivated simultaneously in two different culture media: HTF, the default medium, with either Universal IVF, Global or IVF-30 as the secondary media. The sibling oocytes by each patient were randomly divided between the two culture media following intracytoplasmic sperm injection (ICSI). On day 1 the pronuclear stage of zygotes were evaluated and on day 2 embryos were evaluated according to the number of cells, percentage of fragmentation and number of nuclei. Z-test and odds ratios were used in the statistical analysis. There was a higher percentage (55.2%) of class A1 + A2 zygotes with IVF-30 compared with HTF, Global or Universal IVF media (49.1%, 44.7% and 44.2%, respectively). The percentage of Top embryos was significantly higher with Global (40.2%) compared with HTF (21.3%), IVF-30 (25.0%) or Universal IVF media (11.2%). Global medium produced more Top embryos evaluated on day 2 of development.

Citation

Raquel Di Falco Cossiello, Alexandros Aggelis, Daniel Faúndes, Carlos A Petta. Morphological differences in human zygotes and embryos cultured in different media. Zygote (Cambridge, England). 2012 Nov;20(4):399-405