The optimal embryos on day 2 are those with 4 cells, while on day 3 are those with 8 cells. Having more or fewer cells, as we have seen throughout the article, assumes that the embryo is not of excellent quality.
In the case of having 6 cells, the embryo would be classified in category C, whether it is day 2 or day 3. In the case of having 8 cells, it will be necessary to assess how many there were on day 2. Thus, if it comes from an embryo with 4 cells on day 2, it will be of quality A, while if it had 6 cells it will be of category C. If it comes from an embryo with 4 cells on day 2, it will be of quality A, while if it had 6 cells it will be of category C.
Read the full article on: Classification of Embryos According to Their Quality ( 58).
Zaira Salvador
BSc, MSc
Bachelor's Degree in Biotechnology from the Technical University of Valencia (UPV). Biotechnology Degree from the National University of Ireland en Galway (NUIG) and embryologist specializing in Assisted Reproduction, with a Master's Degree in Biotechnology of Human Reproduction from the University of Valencia (UV) and the Valencian Infertility Institute (IVI)
License: 3185-CV
