What makes the new technique called somatic cell nuclear transfer appealing to doctors

For maybe a day, about 9 months before you were born, you were just one cell. Then you were two identical cells. Then you were four. Then eight.

Since then, you've grown into a complicated organism with many trillions of cells grouped into specialized tissues and organs. The cells in your brain do the thinking. The cells in your heart pump blood. The cells in your tongue let you taste food. And so on.

In recent years, scientists have made an amazing discovery. Even though most cells have specific jobs, some primitive cells — called stem cells — exist in everyone's body. Stem cells are unspecialized cells that can develop into nearly any type of body cell

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