I hope you are right and scientists do not choose to grow humans in vats. But I think they are already headed in that direction. Here's just one example: http://www.observer.co.uk/international/story/0,6903,648024,00.html
Sunday February 10, 2002 The ObserverOf course, what you seem to be unwilling to admit is that a societal practice of abortion has blown the doors down to openly practice eugenics.
Doctors are developing artificial wombs in which embryos can grow outside a woman's body. The work has been hailed as a breakthrough in treating the childless. ...
I admit that. I think the debate over when life ends is just as important as the debate over when it begins.
Trouble is that, even though as Republicans/Libertarians we can have these heated debates on the topic (they are related), we have to get some public discussion on the national stage without ad hominems or other fallacies of logic. We do need to advance an agenda on this, because we do agree there is a problem with the application of the laws and their affect on politics. We as a society, have allowed too many morons to escape accountability for their own lives and this issue is a major launch point for our enemies on the Left...
We also need to keep our more enthusiastic allies from scaring people away. There is a delicate balancing act and there is no consensus. There is also no room for much compromise since, knowing my personal view, you can also see how important I think the issue is. It relates to a great many other things that are or may become social pathologies nobody is willing to accept...