1. Recurring Questions, Seeing and Believing
2. Hypothetical and Observed Embryos with Microscopes at Work
3. Experimental Embryos in the Laboratory
4. Inherited, Evolved, and Computed Embryos
5. The Visible Human Embryo
6. The Idea of Engineered and Constructed Embryos
7. Constructing Embryos for Society, Stem Cells in Action
8. Constraints and Opportunities for Construction