I preface this post by admitting I have not thought much about the subject.
I am torn really on my thoughts. I see the argument about not playing God, but I think the argument is not that solid. I think we play "god" all the time with our body. For example if a person is born with a defective heart valve, modern medicine has provided a way for us to correct this defect. I do not see Christians lining up outraged over this surgery. What is the difference between correcting a problem and preventing a problem? I just don't know really.