Why don't we hit 2 birds with 1 stone and combine embryonic stem cell harvesting and abortions?

In class we learned about how embryonic stem cells are capable of specializing into every kind of cell in the human body and potentially can cure almost all diseases. However, the ethical issue was that it's unethical to kill an embryo for a stem cell. Well, what if a person that wanted an abortion could donate... show more In class we learned about how embryonic stem cells are capable of specializing into every kind of cell in the human body and potentially can cure almost all diseases. However, the ethical issue was that it's unethical to kill an embryo for a stem cell. Well, what if a person that wanted an abortion could donate their blastocyst's stem cells to a patient in need? It's a win-win situation and everybody benefits.
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