I am thinking more long-term. Technology that is not used now, will become used in a limited way. Then it will become more mainstream. Pretty soon, it is more likely than not that people are utilising the technology to design the family they choose. There is a gender imbalance in China simply due to the one child policy, and people aborting girl babies, or killing them after they have been born. Our generation should understand better than anyone how quickly new technologies go from being used by the minority to the majority. And who will be excluded from using this technology? You say someone with 2 boys should be allowed to select to have a girl. But what about someone who only wants one child - and wants that child to be a girl? Why should that person be excluded from selecting gender just because they want fewer children? It's easy to say 'oh we will take away the right to use the technology once things start going bad' - but once something is out there, it's really difficult to then take it away. Take smoking, for example. We KNOW it is bad. We've known for a long time. But once we are given the right to smoke, it is very difficult to take that right away. I think it is a very slippery slope, and we need to be so careful. It is so much bigger than 'I want a girl/boy baby'. The potential effects are huge.