joanne pushkin is executive director of dems breast info.and advocate and breast cancer survivor herself. why is breast density such a crucial thing to know about for anybody who has breasts? >> they are common and normal. most women have some level of breast density in their breasts. as density increases, so does the likelihood of cancer will be missed if it is present. breast density in and of itself is an independent risk factor for the development of breast cancer. women with dense breasts, it can increase their risk. so they need to know this information. >> now that these new requirements have gone into effect, will it mean it will be more plain english, or a standardized language that will be used? >> es, some state laws did not even tell the woman she had dense breasts, or that she was at increased risk. the new notification includes four components. it definitely tells a woman if she has dense breasts, the second tells her it can hide cancer, that it increases her risks, and other tests might detect cancers that mammograms may miss