Stem Cells: A Historical Review about Biological, Religious, and Ethical Issues

Table 3

Main bioethical concerns of stem cells.

Bioethical reserves of stem cell resources
Embryonic stem cells	Adult stem cells
In vitro fertilization/somatic cell nuclear transfer (SCNT)	Nonsignificant bioethical reservations on their use, which mostly concern informed consent and noncommercialization
Consent of donors and subsequent destruction of blastocysts (social/religious questions); The administration of oocytes requires the consent of the donor and suspicions for their possible use in reproductive cloning.