Embryo Research - The scientific aspect. Summary The technique where scientists use the stem cells from the embryos for research after which the embryo in consideration is useless and is discarded. Embryonic stem cells are the ones which are undifferentiated, highly totipotent and provide a good opportunity/platform for medical revolution. Main aim is organ and tissue replacement. History- Experiments done on rats bone marrow, finding of the cell surface antigen and relating it to compatibility in tissue matching. Main scientific techniques Eggs harvested from the mother, egg like blastulas are harvested, cultured and incubated in external condition, successful embryo are implanted, others are used for research. Ethical views are against such research claiming the man handlement of a new life with soul. The method has few flaws in terms of treating Parkinsons and showing chromosomal abnormalities.