Question: What is another name for the stem cells located in the organs of fetuses?
About the article "Stem cell", section "Fetal".

Candidate passages:
The primitive stem cells located in the organs of fetuses are referred to as fetal stem cells.
There are two types of fetal stem cells:
 Fetal proper stem cells come from the tissue of the fetus proper, and are generally obtained after an abortion.
These stem cells are not immortal but have a high level of division and are multipotent.
 Extraembryonic fetal stem cells come from extraembryonic membranes, and are generally not distinguished from adult stem cells.
These stem cells are acquired after birth, they are not immortal but have a high level of cell division, and are pluripotent.
The Fetus Farming Prohibition Act of 2006 () is an Act of the United States Congress that was sponsored by Republican Senators Rick Santorum, Sam Brownback, Richard Burr and Jeff Sessions, and signed by President George W. Bush.
It is an amendment to the Public Health Service Act ().
This act is a response to the idea that, at some point in the future, a technology might be developed that involved cells or tissues being removed from fetuses and used for fetal tissue implants or stem cell therapy.
This proposal is controversial and has been termed "fetal farming" and "fetal organ harvesting".
In the act, this procedure was defined as the intentional creation and use of human fetal tissues or organs for scientific or medical purposes.
Some writers, including Robert P. George and Wesley J. Smith, have argued that embryonic-stem-cell research will inevitably lead to such procedures.
Some supporters of embryonic stem cell have rejected this comparison.
Other bioethicists and medical experts, including Jacob M. Appel and Sir Richard Gardner, have welcomed the possibility of using fetuses as a way to increase the supply of organs available for transplantation. 
Plant stem cells are innately undifferentiated cells located in the meristems of plant.
Plant stem cells serve as the origin of plant vitality, as they maintain themselves while providing a steady supply of precursor cells to form differentiated tissues and organs in plants.
Two distinct areas of stem cells are recognised: the apical meristem and the lateral meristem. 
Stem cells are characterized by their ability to self-renew for a prolonged time and still maintain the ability to differentiate along one or more cell lineages.
Stem cells may be unipotent, multipotent, or pluripotent, meaning they can differentiate into one, multiple, or all cell types, respectively.
Pluripotent stem cells can become cells derived from any of the three embryonic germ layers.
Stem cells have the advantage over glial cells because they are able to proliferate more easily in culture.
However, it remains difficult to preferentially differentiate these cells into varied cell types in an ordered manner.
Another difficulty with stem cells is the lack of a well-defined definition of stem cells beyond hematopoietic stem cells (HSCs).
Each stem cell 'type' has more than one method for identifying, isolating, and expanding the cells; this has caused much confusion because all stem cells of a 'type' (neural, mesenchymal, retinal) do not necessarily behave in the same manner under identical conditions. 
In harvesting embryonic stem cells, a human embryo is destroyed.
Many pro-life individuals associate this act with abortion and consider it immoral.
Amniotic epithelial cells are harvested from the placenta, which is commonly discarded after birth.
The cells are very easily obtainable without the use of intrusive procedures.
Thus their use averts the controversy about embryonic stem cells.
There are also large amounts of amniotic epithelial cells found in the placenta and can be found in upwards of 50-100 million cells from one extraction.
However, several billion cells are required to use for transplantation in order to treat and fight diseases.
Therefore, the cells must be expanded in a lab to have enough cells for transplantation.
Unlike embryonic stem cells, amniotic stem cells have not shown a propensity for developing into teratomas and other cancer-like tumors upon injection into living tissue.
Amniotic epithelial cells have not been known to produce cancerous tumors in the host despite the fact that these cells do express genes found in embryonic stem cells that are known to promote tumor formation.
Organs engineered from amniotic epithelial cells obtained from the placenta associated with a particular person's birth would not be rejected by that person; such organs would have the same genotype as that person and thus be fully compatible with that person's immune system.