Abnormal patterns of DNA methylation in cloned embryos are also observed in post-implantation stages. Abnormal gene expression, especially in translational regulators, was found in extra-embryonic tissue of 26-day fetuses (Chae et al., 2009). Furthermore, the extraembryonic tissue was smaller in the clones than in the control conceptuses. Higher levels of methylation and abnormal expression of imprinted genes in the placenta of dead cloned pigs was also present compared to the live clones and the control group (Wei et al., 2010). More aberrant gene expression was found in the neonatal deceased females than in controls (Jiang et al., 2008). There are also differences in gene expression of 1-month-old cloned pigs, compared to age-matched controls, in the brain, kidneys, and lungs. Moreover, when the global level of methylation was measured, hypermethylation was observed in the clones relative to the controls (Park et al., 2011).