If Oklahoma is any indication of what might happen, they would choose Not to have children. Quite possibly Ban it.
Isn't it medically inevitable that we will be able to bio-engineer every aspect of our offspring?
This topic is sorta just segway on the way there. But seeing as how there is very little you can do short of abortion, which would be contradictory to anti-gay pro-lifers (usually go hand in hand), there is very little use to this information.