Her longtime friend Brian said basically that her family wouldn't agree with that sort of thing and danced around their politics and stance on social issues, seeming to say that they are on the conservative side.
Her from school friend Kio wanted to adopt Caylee and had the money, etc. and said her folks wouldn't let her (this is the friend that also wasn't allowed there when Cindy was home, only George, because of Cindy not liking her ethnicity, so who knows if it was an 'adoption in general' or 'adoption by Kio' that apparently they objected to)
Both of the accounts are in part 3.
So I think that might be a thought forced her to have Caylee if abortion and adoption were not permissable options? Not sure.