its not your choice to tamper with human life!
hows about if you were aborted or held up for research...
would you give a kidney or two for research??

not in you mind you would...but if you were an infant at least..you would have the chance to make that voice clear!
we grow as humans...and it can be clearly stated that on an issue as complex as human tampering...some adult human beings are not able to make that choice for themseleves, and when that is not present, we must decide for them but let nature take its course!