Module 4 Lesson 3 - 1
Lesson 3 — Fetal Development
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The process of prenatal development continues after the embryonic period. In the last lesson, you saw how embryonic development progresses from a single cell to an organism of millions of cells in less than two months.
At the beginning of the ninth week of prenatal development, the embryo name is dropped, and the developing offspring is called a fetus. As the embryo went through morphogenesis, all organ systems were formed, and now they need time to mature or develop further. The placenta and umbilical cord are almost completely formed and will soon take over hormonal control of maintaining the pregnancy.
This lesson focuses on the following questions to understand fertilization and embryonic development:
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What are the major events of each trimester?
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What is the significance of the first trimester?
