Category Archives: Blastocyst

What is a Blastocyst?

From ovulation to fertilization; how a Blastocyst is formed

When undergoing IVF, a blastocyst is the stage the embryo reaches after 5 days in culture from the egg retrieval. During the three first days of development the embryos start to divide in separate cells, and they are called cleavage embryos. It is only from day 3 to day 5 that the blastocyst is formed.

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