Even though embryonic stem cells can differentiate into more cell types than adult, they require the destruction of an embryo. This is why there is such an ethical controversy over them. The pro-life movement says it is akin to abortion.<ref>http://www.frc.org/get.cfm?i=WU09C06&f=PG07J01</ref> That being said there is some research that shows that embryonic stem cells might be obtainable without destruction of the embryo, though this research is not definite yet.<ref>http://www.cmda.org/AM/Template.cfm?Section=Stem_Cell_Research&TEMPLATE=/CM/ContentDisplay.cfm&CONTENTID=12577</ref> | Even though embryonic stem cells can differentiate into more cell types than adult, they require the destruction of an embryo. This is why there is such an ethical controversy over them. The pro-life movement says it is akin to abortion.<ref>http://www.frc.org/get.cfm?i=WU09C06&f=PG07J01</ref> That being said there is some research that shows that embryonic stem cells might be obtainable without destruction of the embryo, though this research is not definite yet.<ref>http://www.cmda.org/AM/Template.cfm?Section=Stem_Cell_Research&TEMPLATE=/CM/ContentDisplay.cfm&CONTENTID=12577</ref> |