Maybe I've read one too many "end of humanity via the unintended side effects of science meant to improve our lives", but there seems to be some logic in that scenario. Especially as it relates to cloning.
Any procedure would have potential flaws even the first time it was used and as homosapiens are complex beings, negative outcomes, including potentially lethal and communicable mutations of diseases in the cloned DNA are possible. How could scientists ever be completely sure to weed out genetic predisposition, for example, to cancer or diabetes?
Further, miscarriages occur naturally all the time because something wasn't right with the growing embryo, but in the artificial womb of a lab, is that possible or will a mutation just continue to develop?
That said, there is also question of morality. Creating a human life is a huge responsibility. What if the negative outcome results in the suffering of the cloned being? Who's responsible for its upbringing and nurturing? Are they to be adopted and live a normal life or to live with the scientists who cloned them?
Ethics and guidelines would have to be in place first and then, as I already noted, nature is unpredictable and sometimes dangerous.
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