| 41. | But human embryos must be destroyed to obtain these stem cells.
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| 42. | In those pregnancies, placentas form, but the embryos die.
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| 43. | Embryo selection could be acceptable in that circumstance, he said.
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| 44. | Only healthy embryos are implanted in the mother's uterus.
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| 45. | After considering the overwhelming ethical concerns about human embryo cloning experimentation,
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| 46. | There is widespread opposition to using such embryos to make babies.
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| 47. | I am uneasy about the destruction of embryos under any circumstances.
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| 48. | The cells are obtained from early embryos discarded by fertility clinics.
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| 49. | A 1995 law prohibits federal funding of research that manipulates embryos.
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| 50. | The team also put five cloned cow embryos into three cows.
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