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Eclosión-asistidaOn day 2 or 3 after fertilisation, the embryo is formed by four or eight cells, and a pellucid zone, which is a kind of wrapping that protects the embryo in its first days of development, and which breaks on the sixth day so that it can be released and implanted in the endometrium or uterine wall.

In some cases, due to different causes, this hatching does not occur naturally. To solve this problem, we can apply an assisted hatching technique, that consists in making a small hole in the pellucid zone prior to its transfer, to thus facilitate its hatching on day six after fertilisation, providing us with a greater rate of embryo implantation and therefore of gestation.

This technique is applied in cases where there have been prior implantation problems, where the quality and development of the embryos is not right, where the patient is over a certain age, and where the pellucid zone of the embryo is abnormally swollen.

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