I think it depends when and where you are talking about. You may well be right about the current situation. But the Birch Society was not pro-life, for instance, back in the early days.
I don't know where you get that idea. They were pro-life before Roe v. Wade was ever handed down.
I recall a Bulletin in which they called on members in all states where abortion was illegal to write to federal military hospitals located within them to call on them to stop providing abortions.