| 1. | The researchers successfully extracted stem cells from 18 of the blastocysts.
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| 2. | In the inner core of the blastocyst are embryonic stem cells.
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| 3. | The small sac inside the blastocyst begins producing red blood cells.
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| 4. | This will lead to one inner cell mass and one blastocyst.
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| 5. | At this point, the exocoelomic cavity replaces the blastocyst cavity.
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| 6. | Mouse chimaeras obtained by the injection of cells into the blastocyst.
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| 7. | Others believe that blastocysts are potential humans but not quite there yet.
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| 8. | Scientists extract the mass of stem cells from the blastocyst for research.
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| 9. | To destroy the blastocyst is murder, in their view.
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| 10. | On average, only a small fraction of blastocysts yield stem cells.
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