https://www.msu.edu/~mituslau/atl/review4.html
Ethically, many people find the processes of embryoinc stem cells and even the research against their religion, and their personal beliefs. It is written that from the research of cloned mice, it is known that embryonic stem cells were found unstable. Embryonic stem cells could possibly cause some fetal abnormalities such as fetal growth and development could be affected. It is known also that embryonic stem cells can produe tumors. In an experiment with rats, they tried to inject cells into the brain. The stem cells stayed disorganized and brain cells around them began to die.
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