Study: Birth-Control Pill and Abortion Spike Breast-Cancer Risk (19290) Doctors in India report a tenfold increased risk of breast cancer with oral contraceptive use and sixfold higher risk after an abortion.

http://www.ncregister.com/daily-news/study-birth-control-pill-and-abortion-spike-breast-cancer-risk/

http://www.polycarp.org/overviewbreastcanceroralcontraceptives.htm