What can go wrong with cloning?
There are no complications that are unique to cloning. These problems are also seen in animals born from natural mating or assisted reproductive technologies. They seem to happen more often in clones for a number of reasons that probably have to do with parts of the procedure that occur outside the body. The embryo may fail to develop properly during the in vitro stage or early on after transfer to the surrogate and may be flushed out of the uterus. If it does develop, the embryo may not implant properly into the uterus of the surrogate dam. Alternatively, the placenta may not form properly, and the developing animal won’t get the nourishment it needs. Large Offspring Syndrome (LOS) is seen in pregnancies of cattle and sheep that come from both assisted reproductive technologies and cloning. With LOS, the fetus grows too large in the uterus, making problems for the animal and its surrogate dam. LOS has not been observed in goats and swine. As a group, livestock clones tend to have more
