During the first four days following conception, the structure of 60 to 80 cells is called the

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The structure of 60 to 80 cells during the first four days following conception is called the blastocyst. A blastocyst consists of an inner cell mass (ICM), which later becomes the embryo, and an outer layer of cells known as the trophoblast, which gives rise to the placenta. The terms "homo spherical" and "zygotenoid" are not used to describe the early stages of embryonic development, and "blobonoidal entity" is not a recognized scientific term.

During the First Four Days Following Conception, the Structure of 60