This 100%. I have some sympathy for the right-to-life crowd although abortion is not really a big issue for me. That said, yes, travel to another state for whatever reason must be allowed.
So one would think, and so we assume will remain the case, but one cannot entirely predict what craziness will actually happen any more.
Since privacy has been removed from the table, there is, presumably, no right for a woman to conceal her condition except the fifth amendment, which might not not help if other means are used to detect it. And though there are laws concerning interstate commerce and the like, there is actually no Constitutional statement that explicitly allows unrestricted interstate travel. It would be outrageous and ridiculous, but not, it seems, unconstitutional, to control movement across a border. Anti-discrimination laws might make it difficult to apply only to women of fertile age, but probably not impossible. One could, after all, screen everyone, even if the goal is only to catch pregnant women, as we are now screened at airports.
We can, I suppose, presume that travel and return is the issue here, but remember that, as far as I can determine, the Constitution fairly explicitly supports the fugitive slave laws, which apply, not to travel and return, but migration. Slavery itself was abolished, and the laws repealed, but I do not think there ever was a Constitutional challenge to the basic principle that a person deemed criminal in one state could be extradited from another in which they are not.
It's pretty far fetched to suggest that a person from one state could be extradited and prosecuted for moving to another in order to escape repressive laws, but these days, with this court, I think we should never be too complacent about how far the long dong of the law might reach.
This is all ridiculous of course. Ha ha, it will never happen here. It never does. Ha ha.