What about the application of stem cell research?

The stem cell is a kind of undifferentiated cells which can differentiate into specialized cells and can divide to produce more stem cells. They have been found in multi organisms. Two broad types of stem cells exist in mammals: embryonic stem cells isolated from the inner cell mass of blastocysts, and adult stem cells. In adult organisms, stem cells and progenitor cells play a role in repair system for the body. But in a developing embryo, stem cells can differentiate into all the specialized cells but also maintain the normal turnover of regenerative organs, such as blood, skin, or intestinal tissues. Successful utilization of stem cells in regenerative medicine depends on the above important features. There are three known accessible sources of autologous adult stem cells in humans: Bone marrow, Adipose tissue (lipid cells), and Blood. Stem cells can also be taken from umbilical cord blood just after birth. Among all stem cell research types, autologous harvesting involves the least risk.