If you want to reduce abortion numbers by "making it rare", you are going to have to rethink a lot of policies. Sex education - ignorant people are more likely to get pregnant. Contraception- obvious, but upsets the religious lot, especially if given to kids. Welfare- if you're going to pressure the poor into work, they'll be a lot better off working without bringing up kids. Health care- both parents and kids need it. Immigration- it's a lot easier to stay under the radar if you ahven't got kids.

Perhaps sexual practices too- more oral sex = fewer babies? Just say "Mmmmmmfffff...."