Two-thirds of women in their 40s have dense breast tissue, which is why mammography doesn't work as well in them.
دو سوم از زنان در دهه ۴۰ زندگی‌شان بافت متراکم پستان دارند، که ماموگرافی در آن‌ها به خوبی جواب نمی‌دهد