How are stem cells obtained?

Stem cells are cells that can divide and make copies of themselves.

They can also make themselves into other kinds of cells

needed throughout the body for growing and 

repairing of damaged cells.

Where can these remarkable cells be found? They can be found

in four different places:

1. Embryos: Stem cells obtained from embryos are called
Embryonic stem cells. They are gathered from embryos that
are three to five days old.
Embryonic stem cells are pluripotent which means
they can divide and become any type of cell in the body.

2. Adult Stem Cells: Stem cells that can be found from

adult tissues. These are few in number.

3. Induced Pluripotent stem cells are adult stem cells that have been changed into cells like the Embryonic Stem Cells. 

4. Perinatal Stem Cells are stem cells found in amniotic fluid and umbilical cords. They can also be changed into specialized cells.

(Stem Cells: What they are and what they do)

(Science-Junkie)