Does abortion increase the risk of breast cancer?

Abortion does not increase the chance of developing breast cancer according to the World Health Organization's research conclusions.

Does medical abortion increase the risk of breast cancer?

No, having an induced medical abortion does not increase a woman’s chance of developing breast cancer. The World Health Organization has stated that “sound epidemiological data show no increased risk of breast cancer for women following spontaneous or induced abortion.”[1]

Citations

^{[1] Safe Abortion: Technical and Policy Guidance for Health Systems. The World Health Organization. Second Edition. 2012 https://apps.who.int/iris/bitstream/10665/70914/1/9789241548434_eng.pdf}