These problems cannot be detected prenatally, because they are not genetic defects in the usual sense they arise not from missing or defective genes, but from the uncoordinated or disorderly expression of genes. Almost all scientists and ethicists therefore agree at this time that attempts at human cloning would be grossly unethical. Such a ban would permit the use of cloning to make countless human embryos, but would forbid transferring such embryos to a womb for purposes of live birth. Such a selective ban would define a class of new human beings that it is a crime not to destroy. Other scientific research, using cloning techniques to produce molecules, DNA, cells other than human embryos, tissues, organs, plants, or animals other than humans, is explicitly permitted.
Cloning is the ultimate dehumanizing of human reproduction.
New human lives are made in the laboratory, tailored to preset specifications to be mere carriers of genetic traits that others find useful. This procedure fails to respect the dignity of the resulting child, who has a right to arise from mother and father as a new and valued person with his or her own open future. Such a ban does not actually ban cloning. It waits until the cloning procedure is finished, then forbids live birth of the resulting clones. The only effective way to ban human cloning is to ban use of cloning to initiate the development of new humans.