4 h 53 m, 3 abr 2002 año - Implantation

Descripción:

The zygote ends up in the uterus. While this is happening, the zygote begins to split into a cluster of cells. This is called a morula. As it rapidly divides into more cells, it becomes known as a blastocyst and implants itself into the endometrium, or uterine lining. The inner cells in the blastocyst will become the embryo, and the outer cells will become the placenta.

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