I don't know that having had a child necessarily puts a woman on the right side of the abortion issue. Most women I know who have had an abortion also brought a child to term and raised him or her. They had an abortion when it wasn't "convenient" to have a child and didn't consider it to be an ethical issue.
Also, life issues aren't "politics" to me and weren't when I was 18 or 19. They were part of what I would later learn was called natural law, including the instinct of self-preservation and preservation of offspring (in most higher mammals).