You bring up a very good point. Let’s not forget the meager research done linking abortion to breast cancer, and the fact the the results and further research are being repressed.
http://www.health.ny.gov/environmental/investigations/cmp/docs/cmp_report.pdf
The importance of reproductive factors in affecting breast cancer risk has been known for a long time. Women who have never given birth (or had a full-term pregnancy) are at a higher risk for breast cancer compared to women who have carried a pregnancy to term.It's the top of page 26. It was a study about a presumed cluster on Long Island, NY. It's not repressed, but people have to look for it. They acknowledge it, but not explicitly as abortion. The risk is the same in women who had miscarriages or never were pregnant, IIRC. They don't make a big deal about it.