In what way, exactly? The historical idea that some people groups have less rights than others? That certainly seems to be what the pro-choice position is. Can you prove the exact point of “viability”, because I can assure you that it is much earlier than was thought in 1973. Do you think it’s a good idea to argue that even though society has continually made egregious mistakes in assigning personhood to humans that we definitely have it right this time and this group of people is, in fact, not really people?

Edit to add: racial minority is just one way that in power groups have oppressed out of power groups, but that is not a unique delineation. Often it’s the most visibly obvious, but humans have done a great job of dehumanizing others based on just about any demographic feature you might want to choose. In American history there is ample example of racial discrimination, but there is also religious, gender, age, physical or mental ability, political affiliation, etc. I don’t really see this as any different from those. Choose a reason why some group isn’t “human” enough and that makes them fair game to do whatever you want. It’s your choice to pick and choose the features you think are necessary to treat a growing group of human cells as human or not. I just think it’s pretty regressive to exclude someone because they aren’t developed to your standard of worth.