Im all for genetically engineered babies. The healthier and smarter the better.
I don't think we fully know the ramifications of adding extra genetic material.
As it is, we know that males with an extra Y chromosome make up the vast majority of violent sociopaths.
Could be that babies with additional genetic material from 2 woman, could result in a total psycho biyatch that will nag you to death, ...or turns into a double biyatch at that time of the month.
