A woman's right to abortion is protected. This change, without any scientific basis, serves to further restrict a woman's access to this option. It does so in an indirect and disingenuous way, basically saying "we know it's your right, but we'll fight to keep you from exercising it." You want to debate the issue, debate the issue. Don't use artificial, non-scientific constructs like "beginning of life" to debate a health issue. Don't use oblique tactics to deny women their rights.