I found out last night that my insurance plan covers abortions. I don't think anyone actively elected for that to be part of our plan. I think it's just what the insurer offered. I suspect it's probably an opt-out type of thing, so Catholic churches can tell Kaiser they don't want it.
I know my parents' insurance covered abortion when I was a high school senior. $10 copay due at each of two visits, so $20 total cost.