U.S. mammography centers now must notify women if they have dense breasts. But unfortunately not all insurance plans will pay for the ultrasound or MRI tests leading groups recommend. Here’s a good summary: https://www-scientificamerican-com.cdn.ampproject.org/c/s/www.scientificamerican.com/article/what-the-fda-ruling-about-dense-breasts-means-for-cancer-risk-and-screening/?amp=true