Before Roe there were not as many people aborting babies, but now we have millions each year being killed due to their mothers treating them as property.
That's a poor choice as a statistic. There are simply just more people, so you'd expect the number of any cohort (i.e., aborting women) to grow with simple population growth. Since Roe, there are more nutritionally deficient people, for example.
I'm like smellincoffee, I find 'brain development' to be an important moral consideration. To the best of my knowledge (and it's pretty significant), there's no sentience before 22 weeks. Not saying there's sentience at 22 weeks, just that there isn't beforehand. And so, I find pre-22 week abortions to be mostly morally inconsequential.