Question

After the zygote divides into two cells, it is called a(n) infant, fetus or embryo.

Answer 1

embryo is the best answer for your question.

Answer 2

Once a zygote has divided itself it is already called an embryo. The process of cell division is called mitosis, a zygote then divides itself into two, four, eight and so on which forms the embryonic stem cells of a soon to be fetus.