Scientists don't know enough yet to know how the designer babies will affect the gene pool. Not enough genetic diversity has been proven to lead to defects and other problems. The other children in the family could be affected by the designer babies cause they will look better. A regular kid may become jealous of the designer babies which would cause jealous. It may also make the other children insecure about their appearance.
Designer babies should not be allowed to be genetically modified. Wealthy people will become better looking which is totally unfair. We are all just human and not meant to be perfect because we are perfect the way we are. Risking your baby's life just for it to be “perfect” is definitely not worth it. This really shows what kind of parent you are and if you really care. If everyone was “perfect”, no one would be unique or