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Embryo Stages Animations Review Questions |
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- 0.1 - 0.2 mm in diameter
- The trophoblastic cells that form the walls of the cavity multiply more rapidly than the embryonic cells of the inner cell mass.
- The zona begins to disappear.
- Ovulation age: 4 - 5 days
Question: Which type of cells multiply most rapidly?
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Developmental Stages in Human Embryos by Ronan O'Rahilly and Fabiola Müller. Published by Carnegie Institution of Washington, Publication 637. 1987. |
Stage 2
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Stage 4
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