1. Bailey, R. 2001. Are stem cells babies? Reasononline. Available online at: http://www.reason.com/news/show/34840.html . Accessed 02 Sep 2010.
2. Boyle, J.M. 1979. That the fetus should be considered a legal person. The American Journal of Jurisprudence 59:59–71.
3. Congregation for the Doctrine of the Faith. 1987. Instruction on respect for human life in its origin and on the dignity of procreation: Replies to certain questions of the day [Donum Vitae]. http: http://www.vatican.va/roman_curia/congregations/cfaith/documents/rc_con_cfaith_doc_19870222_respect-for-human-life_en.html . Accessed 02 Sep 2010.
4. Denker, H.-W. 2004. Early human development: New data raise important embryological and ethical questions relevant for stem cell research. Naturwissenschaften 91:1–21.
5. Edwards, R., and P. Steptoe. 1981. A matter of life. London: Hutchinson’s.