In the U.S., about 1 in 8 women (roughly, 12%) will develop invasive breast cancer over the course of her lifetime. In 2019, an estimated 268,600 new cases of invasive breast cancer are expected to be diagnosed in women in the U.S., along with 62,930 new cases of non-invasive (in situ) breast cancer. And although medical tests can be nerve-wracking, they are essential in keeping women’s breasts healthy and getting them proper care if they develop breast cancer.