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27 December, 12:49

When does the embryo form?

A. At the end of the first trimester

B. In the second trimester.

C. A few days after fertilization

D. At the end of the third trimester.

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  1. 27 December, 13:01
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    C. A few days after fertilization.

    Explanation:

    During the first two weeks, the embryo moves through the uterine tube to the uterus where it will implant. The differentiation that establishes the organ systems takes place between 3 and 8 weeks in the first 8 weeks following fertilization.
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