If you have been told that "the pill is safe," or that the hormonal IUD is just a tiny, local dose, you are not alone. Most women hear some version of this. And for some women, the pill or the IUD really may be the right tool. But there is a longer conversation that does not always make it into the visit.

No one knows for sure what causes breast cancer to develop, although cancer stem cells (a kind of cell that has nothing to do with estrogen) are thought to play a role. Cancer causes are complex and related to many issues including inflammation, stress, exposure to radiation, viruses, chemicals, and other factors.