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because they are taken from embryos. The embryos used in these studies were created for reproductive purposes through in vitrofertilization procedures. When they were no longer needed for that purpose, they were donated for research with the informed consent of the donor.

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Q: Why are stem cells so contorvircial?
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Related questions

Are pancreatic stem cells a plant cell?

No. Plants do not have a pancreas, so pancreatic stem cells are not plant cells. Only animals have a pancreas, so all pancreatic stem cells are animals cells.


What are the types of stem cells?

There are five basic stem cells classifications there is embryonic stem cells, fetal stem cells. There are the Umbilical cord stem cells, placenta stem cells, and lastly there are adult stem cells.


Are fetal cells only source of stem cells?

There are 2 type of stem cells * embryonic stem cells * and adult stem cells fetal stem cells are grouped into the adult stem cell category


What replaces dead or damaged cells?

stem cells


Do babies die when their stem cells are removed?

Stem cells are removed just after conception when the zygote is forming into an embryo. When stem cells are taken, the embryo cannot develop, and so does die.


What are the three types of stem cells in adults?

Three types of stem cells in adults are hematopoietic stem cells, mesenchymal stem cells, and neural stem cells.


Can stem cells change into any other cell?

Yes. Stem cells can change into any other cell, through a process called "differentiation" However, adult stem cells are less likely to do so, as opposed to embryonic stem cells that can differentiate readily


What are unspecialized human cells called?

They are called stem cells.


Will Jehovah Witnesses accept stem cells?

Witnesses do not believe in transplants of any kind, so they are against the use of stem cells.


Cells that retain the ability to divide continuously without specializing are called?

Stem cells are cells that are able to divide continuously without specializing. These kind of cells are undifferentiated biological cells.


How many different types of tissue stem cells are there?

There are three different types of tissue stem cells in the body. They include the tissue stem cells also known as adult stem cells, embryonic stem cells, and induced pluripotent stem cells.


What kind of stem cells can only develope into cells that are closely related to the original stem cells?

Multipotent stem cells