I think Roberts sold himself as "an institutionalist" and Keggers pretty much assured Collins he's support Roe's basic rationale that a woman retains some right of choice. How he found that right, and where the right would end, I have no clue. The other four, imo really didn't make any "pledge."
But if a woman has a right to an IUD or morning after pill after being raped, then individuals have right to "terminate" a zygot ... or as Xians would say ... life.
So, overturning Roe will require the Six Repbulican Justices to make the same logical fallicy that the Roe Court did in "deciding what is life" unless they choose to rule that abortion medications and IUDs can be banned. And I really hope they will because imo Xians are a clear and present danger to the republic. They view their religion's laws as greater than the constitution.