What are the different types of Stem Cells and Where do they come from?

There are 5 different types of stem cells - embryonic, fetal, adult, amniotic, and induced pluripotent.

Embryonic stem cells come from the tissue of early stage embryos. In humans, embryonic stem cells come from embryos that are approximately 4 to 5 days old.

Fetal stem cells come from the primitive organ tissue of fetuses. The classification of fetal stem cells remains unclear and is often grouped with adult stem cells.

Adult stem cells are rare and small in number, but can be found in many different types of tissues including umbilical cord blood.

Amniotic stem cells come from amniotic fluid, which is the fluid in the sac containing the fetus.

Induced pluripotent stem cells come from any number of tissue types, including frozen blood samples, that are genetically reprogrammed to behave like embryonic stem cells.

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