embryo fragmentation

Embryo fragmentation

Embryo fragmentation is a phenomenon that takes place in most embryos and its origin is not entirely clear. Some studies would seem to suggest that the fragments come from cell remains that have no nucleus or that they are the result of the decomposition of one or more cells from the embryo itself. The oocyte plays the most important role in fragmentation. Poor oocyte quality can lead to embryos that are highly fragmented. Embryo quality is determined by several characteristics such as the number of cells, their size or if the cell interior has an abnormality of any kind such as granularity or vacuolisation.

Types of embryo fragmentation

However, one of the factors that has most impact on embryo quality is the extent of fragmentation. Based on the amount, in percentage, of space that it occupies, fragmentation is categorised into 4 types or degrees.


2020-07-24T14:01:51+02:001 de June de 2020|0 Comments

Fragment removal

From the very moment when sperm fertilises an ova, a new embryo starts developing and a large number of cell divisions take place. This embryo development is observed in an in vitro fertilisation laboratory up until the blastocyst stage (day 5 or 6 of development). Sometimes during the cell division process, fragments of the embryo become isolated between cells that have developed correctly. These fragments come from embryo cell remains and can stop the embryo from developing correctly. One of the negative impacts consists of issues reaching the blastocyst stage and the posterior impact on implantation in the uterus. In fact, embryo fragmentation is one of the most significant characteristics used to determine embryo quality. […]

2019-06-20T08:32:06+02:0023 de February de 2018|0 Comments
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