Final answer:
The period of prenatal development from two weeks after fertilization through the eight weeks is called the Embryonic Stage. During this stage, cell division, migration, and differentiation occur.
Step-by-step explanation:
The period of prenatal development from two weeks after fertilization through the eight weeks is called the Embryonic Stage. During this stage, cell division, migration, and differentiation occur. By the end of the embryonic period, all of the organ systems are structured in rudimentary form, although the organs themselves are either nonfunctional or only semi-functional.