Where Do The Embryos Come From ?
A. In
Vitro Fertilization - the embryos used in human stem cells research were
usually created for infertility purposes through in vitro fertilization procedures.
When they were no longer needed for that purpose, they were donated for research
with the informed consent of the donor.
B. Somatic
Cell Nuclear Transfer - embryos can be created by transferring the nucleus
of a donor cell into a enucleated oocyte. The embryo will be genetically identical
to the donor.
- Germ
Cells are obtained from aborted fetus tissue.
- The
Stem Cells extraction procedure ends the ability of the embryo to develop
through implantation in the uterus. The removal of the stem cells brings the
existence of the embryo to an end.
Mugur Roz