I'm not convinced. The 9th is hard for me to interpret because of its purposeful vagueness.
But we do have some notes from judges such as the following:
As Justice Scalia observed, “the [ Ninth Amendment’s] refusal to ‘deny or disparage’ other rights is far removed from affirming any one of them, and even further removed from authorizing judges to identify what they might be, and to enforce the judges’ list against laws duly enacted by the people.”
https://www.law.cornell.edu/constitution-conan/amendment-9/n...
IMO, Congress should attack this from a Constitutional ammendment which makes its legality clear: abortions cannot be outlawed. Anything else is just another ticking time bomb, especially something contingent on a 9th ammendment interpretation.
Edit: after rereading the 1st ammendment, the wording of an ammendment should be consistent, so something like, "Congress shall make no law prohibiting the seeking or procedure of abortion."
Thinking more on the 9th, one would have to consider the right to destroy an unborn person, not just the right to bodily autonomy. This becomes a moral or philosophical exercise, perhaps. With the 14th ammendment, it now becomes a question of personhood, which I don't believe the Constitution defines. So I think I am content with my request for an ammendment and not 9th Ammendment guesswork.
Final edit:
Turns out we have prior rulings that state that the 9th ammendment does not cover assisted suicide, which may be applicable to the case (potentially Person definition pending).
Washington v Glucksberg
https://supreme.justia.com/cases/federal/us/521/702/