Although there are reasons that favor both the promotion and the prohibition of cloning human beings, the hazards involved with human cloning heavily outweigh the advantages.The process of cloning is very complicated and faulty. The failure of a clone to implant, grow and develop properly is not uncommon and it oftentimes leads to death before or shortly after birth. Dolly, a famous cloned lamb was actually the only one, out of 277 attempts to clone sheep to live to adulthood. If the case that cloning procedures usually kill organisms before they can live a full life is true, then making a human clone causes unneeded risk and harm to that individual by subjecting him to a shortened life.

The cloning of cells from older organisms can also give cloned individuals a predisposition to genetic mutations, cancer or other diseases. There is a high incidence of major deformities and disabilities in cloned animals. For example, cloned cows usually have heart and lung problems and cloned mice are prone to develop pathological obesity later in life. Also, the DNA used in cloning is likely to be damaged by ultraviolet radiation, which can lead to the accumulation of somatic mutations and increase the incidence of cancer.

The lack of safety and advancement in the procedure of cloning is also a factor to be weighed into the risks of cloning. This lack of safety can be supported through how so few cloning attempts actually work. These failures come from the fact that cloning is a complicated matter in which reprogramming of the transferred cells is not 100% complete. Even scientists who worked with Dolly said the probability that cloning will ever be advanced and safe enough to test on humans is very small. Also, the procedure is unsafe since many of the mutations and developmental abnormalities in cloned organisms cannot be spotted until after birth. Life for a cloned human being would be a hazardous and torturous experience and it should never be made legal!