Tag: number of cells

Embryo classification according to their quality

Embryo quality

Embryos can be classified in 4 categories –from A to D– ranging from best quality to least developed embryos. This classification is mainly visual and rather subjective, but there are also several studies to identify their metabolic activity.

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Embryo quality and grading

Grade I

Assessment of embryo quality is determined by checking their development once a day from the moment of fertilisation to the day in which embryo transfer is performed –on day 3 or day 5, depending on the case.

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