While 60 percent of Americans support the legality of 1st trimester abortions, only 30 percent support the legality of those in the 2nd, and it is in that trimester that the abortion of a fetus with a trisomy abnormality now occurs because the various prenatal tests are at this stage. Mind you, I understand that despite what the public says a larger share of parents who receive “positive” results in that trimester abort the pregnancy than might be expected based on surveys about the legality of the practice. But, there is probably considerable room on the margin for the class of those who would opt for this if the results arrived in the 1st trimester.
And of course trisomy tests are just the beginning. Whole genome sequencing of 2nd trimester fetuses is now possible, and it seems very likely that in the next few years they’ll move all the way to the 1st trimester. At that point the genetic analysis of 1st trimester fetuses will be routinized and be a simple consumption good. The ultimate question is what are we going to do with all that information? This is not hypothetical, speculative, or blue sky. It’s almost a reality.