Let me adjust YJ's response a tad.
If you don't want to get pregnant, then abstain. If you don't want to take responsibility for your actions, then abstain.
By having sex, you are acknowledging the possibility of getting pregnant and as such should be prepared for that possibility and be prepared to take reponsibility for the consequences of your actions. If you are not, then keep the dimes between your legs or your pecker in your pants.
What if you pay for your own abortion? That's taking responsibility for your own actions.