Honestly, this whole abortion issue could be mostly side-stepped.
First off, better sex education in high school would help to decrease teenage pregnancies. None of this abstinence-only sex-education. Second, making contraptions free would also help decrease pregnancies. Third, more women going to college will decrease pregnancies as they will hold off having a child until they are older, and by getting into college, they will graduate with a job that would help that provide for their child when they want one. Next, women being able to the medical treatment, "tubal ligation" as young as 18 years old without parental approval. Finally, providing maternity leave will ensure women will not have to decide between their career and their child.
Pretty much, if women were allowed to have greater control over their body, the knowledge and means to protect themselves, and the financial means to provide for their baby, then you will see fewer abortions.