The new law affects women with dense breast tissue, which makes cancer harder to spot on a mammogram. Former State Senator Joe Simitian wrote the bill. The Democrat says 40 percent of California women who get mammograms have dense tissue and most don't know it. He says under the new law that will change:
Simitian: "You'll get a notice that says you have dense breast tissue, it'll tell you that that can make it harder for a mammogram to be read, that it increases your risk of breast cancer. That you probably ought to have a conversation with your doctor and that there are other screening options."